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.
Documents
Attributes
Advertised Exhaust Duration: | 319 DD |
Kit Type: | GK-Kit - Cam and Gear Kit |
Usage: | Street/Strip |
Title: | Big Mutha' Thumpr 243/257 Hydraulic Roller Cam GK-Kit for Chevrolet Small Block |
Timing Chain and Gears Included: | Yes |
Lifters Included: | Yes |
Lifter Type: | Hydraulic Roller |
K-Kit Upgrade: | K12-602-8 |
Intake Valve Lift: | 0.531 IN |
Advertised Intake Duration: | 299 DD |
Intake Duration at .050 Inch Lift: | 243 DD |
Exhaust Valve Lift: | 0.517 IN |
Exhaust Duration at .050 inch Lift: | 257 DD |
Engine Family: | Chevrolet 262-400 c.i. 8 Cylinder (1958-1998) |
Camshaft Series: | Thumpr |
Cam Type: | Hydraulic Roller |
California Proposition 65: | WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
Basic Operating RPM Range: | 2,500-6,200 R3 |
Amazon ASIN: | B002EE76DE |
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. 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 California Certified Vehicles Manufactured Before 1965?: | 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. Exemption Reason: | N/A |
C.A.R.B. E.O. Number: | N/A |
Package Information
Package Length:26 INPackage Width:10.5 INPackage Height:5 INWeight:21 LBOrderable Status:YesQuantity:1Package UOM:Smallest Pack (Consumer Level)Package Level GTIN:00036584183327Package Bar Code:036584183327Weight Variance:0.000000000Stacking Factor:0Inner Quantity:1 Each
Extended Information
Core Return Days to Expiry:0Country of Origin (Primary):USEmission Code:Not in CAHarmonized Tariff Code (HTS):8409914000Harmonized Tariff Code (Schedule B):8409914000Life Cycle Status Code:Available to OrderLife Cycle Status Description:Available to OrderMSDS Required Flag:NoMSDS Sheet Number:N/ANAFTA Preference Criterion Code:Criteria BNational Popularity Code:Last 5% of Product Group Sales Value National Popularity Description:Last 5% of Product Group Sales ValueOEM’s Part Number:NOriginal Equipment Manufacturer:NOriginal Supplier:NOriginal Supplier Part Number:NPart Number – Old:N/APart Number Superseded To:N/ARefurbished Part:NoRemanufactured Part:NoStock Status:Shelf StockTaxable:YesWarranty Time:12Warranty Time UOM:Month