| 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 |
| Description_DES |
Mutha' Thumpr 235/249 Hydraulic Flat Cam for Chevrolet Small Block |
| Description_EXT |
High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle. |
| Description_INV |
M-Thumpr 235/249 Hyd Flat Cam SBC |
| Description_SHP |
None |
| 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_SHO |
MT 235/249 HFTSBC |
| Title |
Mutha' Thumpr 235/249 Hydraulic Flat Cam for Chevrolet Small Block |
| Engine Family |
Chevrolet 262-400 c.i. 8 Cylinder (1958-1998) |
| Intake Valve Lift |
0.489 |
| Valve Springs Required |
Yes |
| K-Kit Upgrade |
K12-601-4 |
| Advertised Intake Duration |
287 |
| Camshaft Material |
Cast Iron |
| Cam and Lifter Kit Upgrade |
CL12-601-4 |
| Assembly Lubricant Included |
Yes |
| Basic Operating RPM Range |
2,200-6,100 |
| C.A.R.B. Exemption Reason |
N/A |
| Cam Type |
Hydraulic Flat Tappet |
| Camshaft Series |
Thumpr |
| Exhaust Duration at .050 inch Lift |
249 |
| C.A.R.B. Exempt for On-Road Vehicles? |
No |
| Advertised Exhaust Duration |
305 |
| Amazon ASIN |
B002EE69M8 |
| Camshaft Gear Attachment |
3-Bolt |
| C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Exhaust Valve Lift |
0.476 |
| Grind Number |
287TH7 |
| Intake Duration at .050 Inch Lift |
235 |
| C.A.R.B. E.O. Number |
N/A |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? |
Yes, but must be a race/competition only vehicle. |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Lifters Included |
No |
| Lobe Separation |
107 |
| Lifter Type |
Hydraulic Flat Tappet |
| C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967? |
Yes, but must meet tailpipe emission standards for year of vehicle. |
| Usage |
Street/Strip |
| Cam, Lifter and Gear Drive Upgrade |
GK12-601-4 |
| Length |
3.0000 |
| Width |
3.0000 |
| Height |
24.0000 |
| Weight |
9.0000 |
