SKU: 45992019751

Comp Cams Nitrided Camshaft, CB XM 278H-12

$167.37 $185.97
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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Comp Cams Nitrided Camshaft, CB XM 278H-12COMP Cams Xtreme Marine camshafts take advantage of the newest developments in camshaft engineering. Their aggressive lobe design produces better throttle response and top end horsepower than other cams with the same duration at . 050 in., while delivering increased engine vacuum. These cams are available for everything from pleasure boats to race applications, so you can always enjoy Xtreme performance on the water. From hydraulic and mechanical, to

COMP Cams Xtreme Marine camshafts take advantage of the newest developments in camshaft engineering. Their aggressive lobe design produces better throttle response and top-end horsepower than other cams with the same duration at .050 in., while delivering increased engine vacuum. These cams are available for everything from pleasure boats to race applications, so you can always enjoy Xtreme performance on the water. From hydraulic and mechanical, to flat and roller tappet, COMP Cams offers camshafts for your watercraft dating as far back as the 1950s. 

Specifications

Part Type:Camshafts

Product Line:COMP Cams Xtreme Marine Camshafts

Cam Style:Hydraulic flat tappet

Basic Operating RPM Range:2,000-6,200

Intake Duration at 050 inch Lift:234

Exhaust Duration at 050 inch Lift:244

Duration at 050 inch Lift:234 int./244 exh.

Advertised Intake Duration:278

Advertised Exhaust Duration:292

Advertised Duration:278 int./292 exh.

Intake Valve Lift with Factory Rocker Arm Ratio:0.564 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio:0.566 in.

Valve Lift with Factory Rocker Arm Ratio:0.564 int./0.566 exh.

Lobe Separation (degrees):112

Computer-Controlled Compatible:No

Valve Springs Required:Yes

Quantity:Sold individually



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 Custom Deluxe, Custom, Cheyenne, Silverado, Scottsdale
1968 - 1974 Chevrolet C10 Pickup Base
1968 - 1974 Chevrolet C10 Suburban Base
1975 - 1980 Chevrolet C10 Suburban Scottsdale, Silverado, Custom Deluxe
1990 - 1991 Chevrolet C1500 Base
1990 - 1993 Chevrolet C1500 Cheyenne, WT, Silverado, 454 SS
1990 - 1992 Chevrolet C1500 Scottsdale
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 Silverado, Scottsdale
1993 Chevrolet C2500 400 SS, Custom
1991 - 1995 Chevrolet C2500 Cheyenne, Base, Silverado
1991 - 1992 Chevrolet C2500 Scottsdale
1994 - 1995 Chevrolet C2500 WT
1992 - 1995 Chevrolet C2500 Suburban Base
1995 Chevrolet C2500 Suburban LS, LT
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 Scottsdale, Silverado
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, SS, Base, Z28
1967 - 1974 Chevrolet Caprice Base
1973 - 1976 Chevrolet Caprice Classic
1976 Chevrolet Caprice Classic Landau, Classic Estate
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 - 1972 Chevrolet Chevelle Concours, Base, SS
1967 - 1973 Chevrolet Chevelle Deluxe
1968 - 1972 Chevrolet Chevelle Malibu, Nomad
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 Base, Sportvan
1976 Chevrolet G20 Chevy Van, Beauville, Sportvan
1973 - 1974 Chevrolet G20 Van Sportvan, Base
1975 - 1996 Chevrolet G30 Hi-Cube, Beauville, Sportvan, Chevy Van
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1967 - 1976 Chevrolet Impala Base
1976 Chevrolet Impala S, Custom Landau
1975 - 1976 Chevrolet Impala Sport, Custom
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1985 Chevrolet K20 Suburban Custom, Scottsdale, Silverado
1994 - 1995 Chevrolet K2500 Base, WT
1991 - 1995 Chevrolet K2500 Cheyenne, Silverado
1991 - 1992 Chevrolet K2500 Scottsdale
1992 - 1995 Chevrolet K2500 Suburban Base
1995 Chevrolet K2500 Suburban LS, LT
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 Scottsdale, Silverado
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
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1969 - 1972 Chevrolet Kingswood Estate, Base
1973 - 1975 Chevrolet Laguna Base
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1970 - 1974 Chevrolet Monte Carlo Base
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1973 - 1975 Chevrolet Monte Carlo S
1969 - 1972 Chevrolet Nova Base
1973 Chevrolet P10 Van Base
1976 - 1979 Chevrolet P20 Step-Van, Base
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, Scottsdale, Custom Deluxe
1987 Chevrolet R20 Suburban Custom Deluxe
1987 - 1988 Chevrolet R20 Suburban Silverado, Scottsdale
1989 Chevrolet R2500 Cheyenne, Silverado, Scottsdale
1989 - 1991 Chevrolet R2500 Suburban Scottsdale, Silverado
1988 Chevrolet R30 Cheyenne
1987 - 1988 Chevrolet R30 Scottsdale, Custom Deluxe, Silverado
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 Silverado, Scottsdale
1988 Chevrolet V30 Cheyenne
1987 - 1988 Chevrolet V30 Scottsdale, Custom Deluxe, Silverado
1989 - 1990 Chevrolet V3500 Scottsdale
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1972 - 1979 Excalibur Phaeton Base
1977 - 1978 GMC C15 Heavy Half
1977 GMC C15 Indy Hauler
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1979 - 1980 GMC C1500 Suburban Base, Sierra Grande, High Sierra, Sierra Classic
1975 - 1978 GMC C25 Base, High Sierra, Sierra Classic, Sierra Grande
1975 - 1978 GMC C25 Suburban Base, Sierra Classic, Sierra Grande, High Sierra
1968 - 1974 GMC C25/C2500 Pickup Base
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1979 - 1986 GMC C2500 Sierra Classic, High Sierra, Base
1979 - 1982 GMC C2500 Sierra Grande
1994 - 1995 GMC C2500 Sierra SL, Sierra SLT
1991 - 1995 GMC C2500 Sierra SLE
1991 - 1993 GMC C2500 Sierra, Sierra SLX
1979 - 1995 GMC C2500 Suburban Base
1979 - 1986 GMC C2500 Suburban High Sierra, Sierra Classic
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1992 - 1995 GMC C2500 Suburban SLE
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1988 GMC G3500 Rally Custom
1973 - 1976 GMC Jimmy Base
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1968 - 1974 GMC K15/K1500 Pickup Base
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1976 - 1978 GMC K25 Base, Sierra Grande, Sierra Classic, High Sierra
1976 - 1977 GMC K25 Suburban Sierra Grande, Sierra Classic, High Sierra, Base
1968 - 1974 GMC K25/K2500 Pickup Base
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1994 - 1995 GMC K2500 Sierra SL, Sierra SLT
1991 - 1995 GMC K2500 Sierra SLE
1991 - 1993 GMC K2500 Sierra SLX, Sierra
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, Sierra Classic, Base
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1988 - 1995 GMC K3500 Sierra SLE
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1988 - 1993 GMC K3500 Sierra, Sierra SLX
1979 GMC P1500 Base, Value Van
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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 Sierra Classic, Base, 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, Classic, SP
1987 - 1991 GMC V3500 Base
1987 - 1989 GMC V3500 High Sierra, Sierra Classic
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: 45992019751

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4.5 ★★★★★
Based on 5 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
Houston, US
★★★★★ 5
Durable, high-bounce dog balls that hold up well to energetic play
Color: D) 4-Pack 3" Balls (Yellow)
The Chew King 3-inch rubber balls have been great for active play sessions. The rubber feels thick and durable, and the bounce is surprisingly lively compared to many standard dog balls. They’re the perfect size for medium to large dogs and are easy for dogs to carry, chase, and retrieve. After repeated games of fetch, the surface has held up well without cracking or losing its shape. One thing that stands out is how easy they are to clean. Dirt and slobber rinse off quickly, so they’re ready for the next round of play. The bright color also makes them easier to find in grass or bushes compared to darker toys. For longer life, it helps to supervise play if your dog is a very aggressive chewer, since these are designed more for fetch than constant chewing. Also, rotating toys every few days can keep dogs more engaged and extend the lifespan of each ball. Overall, this is a solid set of durable fetch balls that provide great bounce and reliable outdoor playtime fun.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 5, 2026
W
Verified Purchase
WilliamR
Waukegan, US
★★★★★ 5
toughest dog balls in the world
Color: E) 8-Pack 2.5" Balls (Yellow), Color: E) 8-Pack 2.5" Balls (Yellow)
best balls in the universe. I have a 70# pit bull and a 120# presa canaria. All the other balls I bought lasted maybe 3 weeks, I have had these for over a year and play with them and the dogs 5-6 days a week. They still look brand new, They seem like they will last a year or so and they are both serious chewers. A presa has a bite force od about 525psi, twice a pitty
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
Z
Verified Purchase
ZZmum
Los Angeles, US
★★★★★ 5
They worked out great!!!
Color: D) 4-Pack 3" Balls (Yellow), Color: D) 4-Pack 3" Balls (Yellow)
So far have been the solution we were looking for! I was extremely tired of the non stop destruction and order of large Chuckit balls for our high energy/high drive dog. For about the same price I bought four 3 inch balls to test out their durability and fit for the thrower. THEY WORK! Perfection! They even make a fun whistling sound as they sail through the air. They do require a tad more muscle in the thrower but that is not a problem. They have already shown to be WAY more durable. The 3 inch balls work in the large chunkit thrower. Super find.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2026
H
Verified Purchase
HEATHER
San Leandro, US
★★★★★ 4
Durable
Color: E) 8-Pack 2.5" Balls (Yellow)
My dogs love them. They are very bouncy, and ideal size, and durable. Great alternative to a tennis ball which in my house only last 30 minutes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
K
Verified Purchase
Kindle Customer
New York, US
★★★★★ 5
Toughest dang balls I ever played with
Color: D) 4-Pack 3" Balls (Yellow), Color: D) 4-Pack 3" Balls (Yellow)
These things are amazing. We have a ball obsessed Husky mix and he has destroyed Kongs, Chuck Its, and a whole lot of other ball shaped objects. These things? We bought the 4 pack because we bought 4 Chuck Its and they lasted a year, all 4 of them only a year, before they were destroyed. A year after buying these? We only bought more because he lost 3 of them. I think we did find one under the dresser after buying this pack... But the others? They either ended up thrown over the fence into the woods or lost in the holes in the yard the monster digs up. Other than a few pockmarks from his teeth and maybe some mud, they may as well be brand new even after a year or two. Probably the most chew resistant thing we've ever bought him. They're really solid rubber and since he hasn't managed to bite into them to take out a chunk, they're safe as hell. Being as big as they are, I don't worry he's gonna choke unattended on them like the usual size of ball. About the only concern is forcing breaks so he can have breathing moments when he manages to talk us into fetch outside. It fits in the larger Chuck It thrower too, so we haven't lost any value from having those torn up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026

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