COMP Cams K12-602-4 Big Mutha' Thumpr 243/257 Hydraulic Flat Cam K-Kit for Chevrolet Small Block
by COMP Cams
SKU ds_BDQQ_K12-602-4
Proudly Canadian
Albertan Owned
Supporting Canadian truckers since 2018
Secure Payments
Financing Available
SSL encrypted checkout with financing options
Trusted Brands
Top-Quality Suppliers
Authorized dealer for Fox, Bilstein, BFGoodrich & 50+ brands
Sold out
Original price
$930.43
-
Original price
$930.43
Original price
$930.43
$930.43
$930.43
-
$930.43
Current price
$930.43
Availability:
Out of stock
Description
K-KIT - Complete Kit Includes: Camshaft, Lifters, Valve Springs, Retainers, Valve Locks, Valve Stem Seals, Timing Chain Set, Assembly Lube (in flat tappet applications), Decals and Instructions.
Resources
Installation InstructionsSpecifications
| Advertised Exhaust Duration | 313 |
| Advertised Intake Duration | 295 |
| Amazon ASIN | B001S1W5I0 |
| Assembly Lubricant Included | Yes |
| Basic Operating RPM Range | 2,500-6,400 |
| C.A.R.B. E.O. Number | N/A |
| C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for On-Road Vehicles? | No |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? | Yes, but must be a race/competition only vehicle. |
| C.A.R.B. Exemption Reason | N/A |
| California Proposition 65 | WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| Cam Type | Hydraulic Flat Tappet |
| Camshaft Gear Attachment | 3-Bolt |
| Camshaft Material | Cast Iron |
| Camshaft Series | Thumpr |
| Description_ASM | Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros/Firebirds/Corvettes received the roller cams early, but many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information. |
| Description_DEF | Engine Camshaft Kit |
| Description_DES | 10 Superlock Steel Retainer Set of 16 for 1.437"-1.500" OD Valve Spring |
| Description_DES | Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chevrolet Small Block |
| Description_DES | Big Mutha' Thumpr 243/257 Hydraulic Flat Cam K-Kit for Chevrolet Small Block |
| Description_DES | Engine Valve Spring Kit |
| Description_DES | High Energy Hydraulic Flat Lifter Set for Chevrolet Small and Big Block. |
| Description_DES | Magnum Double Row Timing Set for '78-'86 Chevrolet V6 and 265-400 Small Block |
| Description_DES | Set of 16 - 10 Degree, 11/32", Single Groove Locks w/ Lash Cap Recess |
| Description_DES | Set of 16 PTFE Valve Seals for .530" Guide Size, 11/32" Valve Stem |
| Description_EXT | Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle. |
| Description_INV | Big M-Thumpr 243/257 Hyd Flat K-Kit SBC |
| Description_KEY | 265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10 |
| Description_MKT | K-KIT - Complete Kit Includes: Camshaft, Lifters, Valve Springs, Retainers, Valve Locks, Valve Stem Seals, Timing Chain Set, Assembly Lube (in flat tappet applications), Decals and Instructions. |
| Description_SHO | Engine Camshaft Kit |
| Description_SHP | None |
| Engine Family | Chevrolet 262-400 c.i. 8 Cylinder (1958-1998) |
| Exhaust Duration at .050 inch Lift | 257 |
| Exhaust Valve Lift | 0.486 |
| Gaskets Included | No |
| height | 5.0 |
| Intake Duration at .050 Inch Lift | 243 |
| Intake Valve Lift | 0.5 |
| Kit Type | K-Kit - Complete Kit |
| length | 26.0 |
| Lifter Type | Hydraulic Flat Tappet |
| Lifters Included | Yes |
| Lobe Separation | 107 |
| LTL | N |
| Title | Big Mutha' Thumpr 243/257 Hydraulic Flat Cam K-Kit for Chevrolet Small Block |
| Usage | Street/Strip |
| Valve Springs Included | Yes |
| weight | 24.48 |
| width | 10.5 |
