Comp Cams Xtreme Marine,XM270H:Cam & S-Kit
SKU: 89458464074

Comp Cams Xtreme Marine,XM270H:Cam & S-Kit

$206.06 $228.96
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Description

Comp Cams Xtreme Marine,XM270H:Cam & S-KitXtreme Marine,XM270H: Cam & S Kit Hydraulic: Jet w A impeller, strong mid range, good throttle response, noticeable idle. Specifications Lifter Type: Hydraulic Lifter Engine Family: Chevrolet 396 454 c. i. 8 CYL. 1965 1996 Cam Family: Xtreme Marine" Hydraulic Flat Tappet Camshafts RPM Range: 1600 to 5800 Valve Timing: 0. 006 Lobe Separation: 112 Intake Centerline: 110 Valve Lash: Hyd.(Intake) Hyd.(Exhaust) Duration: 270(Intake) 286(Exhaust) Duration @

Xtreme Marine,XM270H:Cam & S-Kit

Hydraulic: Jet w/ A impeller, strong mid-range, good throttle response, noticeable idle.

Specifications

Lifter Type: Hydraulic Lifter

Engine Family: Chevrolet 396-454 c.i. 8 CYL. 1965-1996

Cam Family: Xtreme Marine" Hydraulic Flat Tappet Camshafts

RPM Range: 1600 to 5800

Valve Timing: 0.006

Lobe Separation: 112°

Intake Centerline: 110°

Valve Lash: Hyd.(Intake) / Hyd.(Exhaust)

Duration: 270(Intake) / 286(Exhaust)

Duration @ .050" Lift: 226(Intake) / 236(Exhaust)

Valve Lift: 0.544(Intake) / 0.547(Exhaust)

Lobe Lift: 0.32(Intake) / 0.322(Exhaust)



Vehicle Fitments:

Year Make Model Submodel
1967 - 1975 Chevrolet Bel Air Base
1967 - 1972 Chevrolet Biscayne Base
1973 - 1974 Chevrolet Blazer Base
1969 - 1972 Chevrolet Brookwood Base
1978 - 1980 Chevrolet C10 Big Ten
1975 - 1980 Chevrolet C10 Cheyenne, Silverado, Custom, Custom Deluxe, Scottsdale
1968 - 1974 Chevrolet C10 Pickup Base
1968 - 1974 Chevrolet C10 Suburban Base
1975 - 1980 Chevrolet C10 Suburban Silverado, Custom Deluxe, Scottsdale
1990 - 1991 Chevrolet C1500 Base
1990 - 1992 Chevrolet C1500 Scottsdale
1990 - 1993 Chevrolet C1500 WT, 454 SS, Cheyenne, Silverado
1986 Chevrolet C20 Base
1981 - 1986 Chevrolet C20 Custom
1975 - 1980 Chevrolet C20 Custom Deluxe
1981 Chevrolet C20 Deluxe
1975 - 1986 Chevrolet C20 Scottsdale, Cheyenne, Silverado
1968 - 1974 Chevrolet C20 Pickup Base
1968 - 1974 Chevrolet C20 Suburban Base
1981 - 1986 Chevrolet C20 Suburban Custom
1975 - 1980 Chevrolet C20 Suburban Custom Deluxe
1981 Chevrolet C20 Suburban Deluxe
1975 - 1986 Chevrolet C20 Suburban Scottsdale, Silverado
1993 Chevrolet C2500 400 SS, Custom
1991 - 1992 Chevrolet C2500 Scottsdale
1991 - 1995 Chevrolet C2500 Silverado, Base, Cheyenne
1994 - 1995 Chevrolet C2500 WT
1992 - 1995 Chevrolet C2500 Suburban Base
1995 Chevrolet C2500 Suburban LT, LS
1992 - 1994 Chevrolet C2500 Suburban Silverado
1975 - 1982 Chevrolet C30 Base
1975 - 1981 Chevrolet C30 Cheyenne
1981 - 1986 Chevrolet C30 Custom
1975 - 1980 Chevrolet C30 Custom Deluxe
1981 Chevrolet C30 Deluxe
1975 - 1986 Chevrolet C30 Silverado, Scottsdale
1968 - 1974 Chevrolet C30 Pickup Base
1994 - 1995 Chevrolet C3500 Base
1988 - 1995 Chevrolet C3500 Cheyenne, Silverado
1988 - 1992 Chevrolet C3500 Scottsdale
1967 - 1972 Chevrolet Camaro RS, Z28, SS, Base
1967 - 1974 Chevrolet Caprice Base
1973 - 1976 Chevrolet Caprice Classic
1976 Chevrolet Caprice Classic Estate, Classic Landau
1975 - 1976 Chevrolet Caprice Classic Sport
1973 - 1974 Chevrolet Caprice Estate
1975 Chevrolet Caprice Estate Wagon
1967 - 1968 Chevrolet Chevelle 300
1967 - 1969 Chevrolet Chevelle 300 Deluxe
1969 - 1972 Chevrolet Chevelle Concours Estate, Greenbrier
1967 - 1973 Chevrolet Chevelle Deluxe
1968 - 1972 Chevrolet Chevelle Nomad, Malibu
1967 - 1972 Chevrolet Chevelle SS, Base, Concours
1968 Chevrolet Chevy II Nova
1967 - 1974 Chevrolet Corvette Base
1967 - 1975 Chevrolet El Camino Base
1975 Chevrolet El Camino Classic
1968 - 1974 Chevrolet El Camino Custom
1968 - 1975 Chevrolet El Camino SS
1969 - 1970 Chevrolet Estate Base
1973 - 1974 Chevrolet G10 Van Sportvan, Base
1976 Chevrolet G20 Beauville, Sportvan, Chevy Van
1973 - 1974 Chevrolet G20 Van Sportvan, Base
1975 - 1996 Chevrolet G30 Hi-Cube, Beauville, Chevy Van, Sportvan
1973 - 1974 Chevrolet G30 Van Sportvan, Base
1967 - 1976 Chevrolet Impala Base
1975 - 1976 Chevrolet Impala Custom, Sport
1976 Chevrolet Impala S, Custom Landau
1967 Chevrolet Impala SS
1976 - 1980 Chevrolet K10 Scottsdale, Cheyenne, Silverado, Custom Deluxe
1968 - 1974 Chevrolet K10 Pickup Base
1968 - 1974 Chevrolet K10 Suburban Base
1976 - 1980 Chevrolet K20 Silverado, Cheyenne, Scottsdale, Custom Deluxe
1968 - 1974 Chevrolet K20 Pickup Base
1968 - 1974 Chevrolet K20 Suburban Base
1985 Chevrolet K20 Suburban Scottsdale, Silverado, Custom
1994 - 1995 Chevrolet K2500 Base, WT
1991 - 1992 Chevrolet K2500 Scottsdale
1991 - 1995 Chevrolet K2500 Silverado, Cheyenne
1992 - 1995 Chevrolet K2500 Suburban Base
1995 Chevrolet K2500 Suburban LT, LS
1992 - 1994 Chevrolet K2500 Suburban Silverado
1977 - 1981 Chevrolet K30 Cheyenne
1981 - 1986 Chevrolet K30 Custom
1977 - 1980 Chevrolet K30 Custom Deluxe
1981 Chevrolet K30 Deluxe
1977 - 1986 Chevrolet K30 Silverado, Scottsdale
1968 - 1974 Chevrolet K30 Pickup Base
1994 - 1995 Chevrolet K3500 Base
1988 - 1995 Chevrolet K3500 Cheyenne, Silverado
1988 - 1992 Chevrolet K3500 Scottsdale
1976 Chevrolet K5 Blazer Base
1976 - 1978 Chevrolet K5 Blazer Cheyenne
1977 - 1978 Chevrolet K5 Blazer Custom Deluxe
1978 Chevrolet K5 Blazer Silverado
1969 - 1972 Chevrolet Kingswood Estate, Base
1973 - 1975 Chevrolet Laguna Base
1973 Chevrolet Laguna Estate
1975 Chevrolet Laguna S3
1974 Chevrolet Laguna Type S-3
1967 - 1975 Chevrolet Malibu Base
1974 - 1975 Chevrolet Malibu Classic
1975 Chevrolet Malibu Classic Estate
1973 - 1974 Chevrolet Malibu Estate
1970 - 1974 Chevrolet Monte Carlo Base
1973 - 1974 Chevrolet Monte Carlo Landau
1973 - 1975 Chevrolet Monte Carlo S
1969 - 1972 Chevrolet Nova Base
1973 Chevrolet P10 Van Base
1976 - 1979 Chevrolet P20 Base, Step-Van
1970 - 1973 Chevrolet P20 Van Base
1975 - 1997 Chevrolet P30 Base
1975 - 1990 Chevrolet P30 Step-Van
1970 - 1974 Chevrolet P30 Van Base
1988 Chevrolet R20 Cheyenne
1987 - 1988 Chevrolet R20 Silverado, Custom Deluxe, Scottsdale
1987 Chevrolet R20 Suburban Custom Deluxe
1987 - 1988 Chevrolet R20 Suburban Silverado, Scottsdale
1989 Chevrolet R2500 Scottsdale, Silverado, Cheyenne
1989 - 1991 Chevrolet R2500 Suburban Scottsdale, Silverado
1988 Chevrolet R30 Cheyenne
1987 - 1988 Chevrolet R30 Scottsdale, Silverado, Custom Deluxe
1989 - 1990 Chevrolet R3500 Scottsdale
1989 - 1991 Chevrolet R3500 Silverado, Cheyenne
1969 - 1972 Chevrolet Townsman Base
1987 Chevrolet V20 Suburban Custom Deluxe
1987 - 1988 Chevrolet V20 Suburban Silverado, Scottsdale
1990 Chevrolet V2500 Suburban Scottsdale, Silverado
1988 Chevrolet V30 Cheyenne
1987 - 1988 Chevrolet V30 Custom Deluxe, Scottsdale, Silverado
1989 - 1990 Chevrolet V3500 Scottsdale
1989 - 1991 Chevrolet V3500 Silverado, Cheyenne
1972 - 1979 Excalibur Phaeton Base
1977 - 1978 GMC C15 Heavy Half
1977 GMC C15 Indy Hauler
1975 - 1978 GMC C15 Sierra Grande, High Sierra, Sierra Classic, Base
1978 GMC C15 Street Coupe
1975 - 1978 GMC C15 Suburban Base, Sierra Grande, Sierra Classic, High Sierra
1968 - 1974 GMC C15/C1500 Pickup Base
1968 - 1974 GMC C15/C1500 Suburban Base
1979 - 1980 GMC C1500 Street Coupe, Sierra Classic, Sierra Grande, High Sierra, Base, Heavy Half
1979 - 1980 GMC C1500 Suburban Base, Sierra Classic, High Sierra, Sierra Grande
1975 - 1978 GMC C25 High Sierra, Sierra Grande, Base, Sierra Classic
1975 - 1978 GMC C25 Suburban Sierra Classic, High Sierra, Base, Sierra Grande
1968 - 1974 GMC C25/C2500 Pickup Base
1968 - 1974 GMC C25/C2500 Suburban Base
1979 - 1986 GMC C2500 Sierra Classic, High Sierra, Base
1979 - 1982 GMC C2500 Sierra Grande
1991 - 1995 GMC C2500 Sierra SLE
1994 - 1995 GMC C2500 Sierra SLT, Sierra SL
1991 - 1993 GMC C2500 Sierra SLX, Sierra
1979 - 1995 GMC C2500 Suburban Base
1979 - 1986 GMC C2500 Suburban Sierra Classic, High Sierra
1979 - 1982 GMC C2500 Suburban Sierra Grande
1992 - 1995 GMC C2500 Suburban SLE
1995 GMC C2500 Suburban SLT
1975 - 1978 GMC C35 Sierra Classic, High Sierra, Sierra Grande, Base
1968 - 1974 GMC C35/C3500 Pickup Base
1979 - 1986 GMC C3500 Sierra Classic, High Sierra, Base
1979 - 1982 GMC C3500 Sierra Grande
1988 - 1995 GMC C3500 Sierra SLE
1994 - 1995 GMC C3500 Sierra SLT, Sierra SL
1988 - 1993 GMC C3500 Sierra SLX, Sierra
1975 - 1976 GMC G25 Rally, Rally STX, Vandura
1976 GMC G35 Rally STX, Rally, Vandura, Magnavan, Vandura Special, Rally Camper Special
1974 GMC G35/G3500 Van Base
1973 - 1974 GMC G35/G3500 Van Rally, Vandura
1988 GMC G3500 Rally Custom
1988 - 1996 GMC G3500 Vandura, Rally Camper Special, Vandura Special, Rally, Rally STX, Magnavan
1973 - 1976 GMC Jimmy Base
1976 GMC Jimmy High Sierra, Sierra Grande, Sierra Classic
1976 GMC K15 Sierra Classic, Base, Sierra Grande, High Sierra
1968 - 1974 GMC K15/K1500 Pickup Base
1968 - 1974 GMC K15/K1500 Suburban Base
1979 - 1980 GMC K1500 Base, Sierra Grande, High Sierra, Sierra Classic
1976 - 1978 GMC K25 Base, Sierra Grande, High Sierra, Sierra Classic
1976 - 1977 GMC K25 Suburban Sierra Grande, High Sierra, Sierra Classic, Base
1968 - 1974 GMC K25/K2500 Pickup Base
1968 - 1974 GMC K25/K2500 Suburban Base
1994 - 1995 GMC K2500 Sierra SL, Sierra SLT
1991 - 1995 GMC K2500 Sierra SLE
1991 - 1993 GMC K2500 Sierra, Sierra SLX
1992 - 1995 GMC K2500 Suburban SLE, Base
1995 GMC K2500 Suburban SLT
1968 - 1974 GMC K35/K3500 Pickup Base
1979 - 1986 GMC K3500 High Sierra, Base, Sierra Classic
1979 - 1982 GMC K3500 Sierra Grande
1994 - 1995 GMC K3500 Sierra SL, Sierra SLT
1988 - 1995 GMC K3500 Sierra SLE
1988 - 1993 GMC K3500 Sierra, Sierra SLX
1979 GMC P1500 Value Van, Base
1970 - 1971 GMC P25/P2500 Van Base
1975 - 1978 GMC P35 Value Van, Base
1970 - 1974 GMC P35/P3500 Van Base
1974 GMC P35/P3500 Van Motorhome
1979 - 1997 GMC P3500 Base
1979 - 1990 GMC P3500 Value Van
1987 - 1989 GMC R2500 Base, Sierra Classic, High Sierra
1987 - 1991 GMC R2500 Suburban Base
1987 GMC R2500 Suburban High Sierra
1987 - 1989 GMC R2500 Suburban Sierra Classic
1990 GMC R2500 Suburban SLE
1987 - 1991 GMC R3500 Base
1987 - 1989 GMC R3500 Sierra Classic, High Sierra
1990 - 1991 GMC R3500 SLE
1971 - 1975 GMC Sprint Base
1972 - 1974 GMC Sprint Custom
1975 GMC Sprint High Sierra, SP, Classic
1987 - 1991 GMC V3500 Base
1987 - 1989 GMC V3500 Sierra Classic, High Sierra
1990 - 1991 GMC V3500 SLE
1969 - 1974 Iso Grifo Base
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 89458464074

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4.5 ★★★★★
Based on 736 reviews
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Product Reviews
N
NewsFlash
Belleville, US
★★★★★ 4
Great many outlets but insufficient usb power for most needs
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
I absolutely LOVE how many ports/outlets this extension unit has. It has usb-As, usb-Cs, AC outlets, on/off switch... In that regard, it's perfect. But. If you're looking to charge your phone or laptop, for example, by plugging your charging cord without an adapter, directly into a usb-c or usb-a port, you'll be completely out of luck. When I first got this I plugged in my laptop cord directly into one the usb-c ports while using it. I eventually, fairly quickly I must say, realized that it was as though the laptop wasn't plugged in at all. It even seemed to lose power faster than if it weren't plugged in! And, it was the only thing plugged in at the time. So it might just be me expecting a charge instead of the opposite, but the issue stands. I had to go and find my A/C adapter and charge my laptop the same way I would without this unit, as if I was plugged into the wall. Now I'm sure there are people out here surprised that anyone would be confused by having to use an adapter to charge a phone or laptop while using this unit. My confusion comes from the unit having as many usb-c and usb-a ports as it does. I don't think it's a stretch to assume, as I did, that the point of having so many ports is to actually use them. One reason I haven't rated this lower is that I knew of the ports low voltage and wattage, so I wasn't completely surprised by having to use an adapter, though I WAS surprised by how completely useless the usb ports seem to be. Also, one description picture shows a phone being charged WITHOUT an adapter. And this does charge my phone but only if I'm not using it. It stays at pretty much the same battery level if I'm using it while charging it. So I don't think I'm 100% at fault for being surprised If you will be using the usb ports to charge a small appliance, a groomer, a shaver, a toothbrush? I'm sure this will do well. I don't have any of those so I guess I won't be using the usb ports at all or will use them only if I'm not in a rush to get a fast charge. Once the initial surprise subsided, I'm still glad I got this. It has ELEVEN A/C outlets, a flat plug that can fit just about anywhere and behind any piece of furniture, and I could still charge my phone (thought not my laptop) in a pinch. I think the price at the time of this review is fine for those features. 3.5 stars.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
B
Bobby A
Birmingham, US
★★★★★ 5
Many Outlets in One Compact Device!
Size: 5FT, Color: White 2prong
The number of outlets is impressive for its size, and the USB ports are super convenient for phones, tablets, and other small devices. Everything charges steadily without overheating, and the 5 ft cord gives enough flexibility to place it where I need it. I also really appreciate the compact design. Even with so many plugs available, it doesn’t feel bulky or cluttered. It fits nicely behind furniture and keeps everything organized instead of having a mess of adapters everywhere. It’s especially perfect for older homes or apartments with only a couple of outlets per room. While it’s not a substitute for true grounded outlets for heavy appliances, it works perfectly for everyday electronics. These items are typically fine: Phone chargers Laptops LED lamps Routers / modems TVs (modern, low draw) These devices are double-insulated or low risk, so they don’t rely heavily on grounding. Avoid using this for: Space heaters Air conditioners Microwaves Refrigerators Power tools Anything metal-bodied or high-power Without a real ground, a fault could energize the casing and increase shock risk. Overall, this is a solid, reliable, and incredibly convenient power strip. I’d definitely recommend it to anyone needing more outlets and USB charging in one simple solution for appliances motioned above that are safer to use with relatively better price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
C
Celeste
Port Orchard, US
★★★★★ 5
Perfect Sofa-Side Charging Hub
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
I picked this power strip mainly to use next to my sofa, where I usually charge my tablet, phone, and laptop while relaxing in the evening. Having 11 AC outlets and multiple USB ports in one place has made that corner much more organized, and I no longer have chargers scattered everywhere. The layout is well thought out. Larger plugs don't block neighboring outlets, and the flat angled plug fits nicely behind furniture. The 5-foot cord gives enough flexibility to position the strip where it's most convenient. I also like having both USB-A and USB-C ports available for smaller devices. For phones, tablets, earbuds, and similar electronics, the built-in USB ports have been very useful. For my everyday use, charging personal devices and powering small electronics, the unit has performed as expected. The overload protection switch and built-in safety features provide additional peace of mind. Overall, this has been a practical solution for adding more outlets to an older two-prong receptacle while keeping my charging area tidy and easy to access.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
A
Amazon Customer
New York, US
★★★★★ 1
Major Safety Red Flag! 3 Prong Outlets, 2 Prong Plug, This Does Not Provide A Grounded Connection!
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
This power strip has a compact design, a convenient outlet layout, and USB ports, so on the surface it looks useful. The patented three-row layout is clever for spacing the outlets, but that only applies to how the outlets are positioned. It does not change how the strip is actually powered or protected. The problem is the safety design. It has 11 three-prong outlets, but the wall plug itself is only two-prong. Without a ground prong, it is not grounded. The two flat prongs are hot and neutral only, so this does not provide the grounded protection that the three-prong outlets appear to suggest. That also makes the surge protection claims highly questionable to me. A real grounded surge protector should have a grounding path for excess surge energy. With only a two-prong plug, I would not trust this to provide the kind of surge protection people generally expect when plugging in electronics or grounded devices. The manual mentions surge protection, ground protection, short-circuit protection, over-current protection, over-voltage protection, over-heat protection, and UL 1363 safety standards, but I could not find any visible UL, ETL, or similar safety certification mark on the unit or paperwork. The only marking I saw was FCC, which is not the same thing as electrical safety certification. Given the two-prong plug and three-prong outlets, those protection claims feel dubious at best and misleading at worst. The USB charging is also underwhelming. The total USB output is listed as 24W, which is not much for today’s devices, especially when that power is shared across multiple ports. We frequently use 35W or higher from a single USB charger, so I would not buy this for fast or modern device charging either. Because of the two-prong plug paired with three-prong outlets, I will absolutely not use this. I do not want a power strip that makes devices appear protected or grounded when they are not. For me, this is not a small design issue. It is a serious safety concern.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
Y
Yuki WONG
Pawtucket, US
★★★★★ 3
Convenient Design but Raises Some Safety Concerns
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
As other reviews have mentioned, this power strip does not provide true grounding protection. It allows devices with three-prong plugs to connect through a two-prong wall outlet, but the strip itself still relies on a two-prong connection. Because of that, I think it’s important to understand the potential safety limitations before using it, especially with higher-powered electronics. It does offer a large number of outlets and USB ports, which is convenient for older homes with limited access to modern plugs. However, considering the price, there are safer and more reliable alternatives available that may be a better long-term choice.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026

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