Big Mutha' Thumpr 243/257 Hydraulic Flat Cam For Chevrolet Small Block

Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chevrolet Small Block 262-400. Street/strip, needs 9.5:1 compression, 2800+ stall, intake Gears and headers, very rough idle. Vehicle Specific

• Fits Chevrolet GEN 1 Small Blocks including the 262
• 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.
• 265
• 267
• 283
• 302
• 305
• 307
• 327
• 350 and 400. Does not fit LT1/LT4

Attributes:

• Brand Name: COMP Cams
• GTIN: 00036584175278
• Advertised Exhaust Duration: 313
• Advertised Intake Duration: 295
• Amazon ASIN: B002EE6EKK
• 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
• Cam Lifter and Gear Drive Upgrade: GK12-602-4
• Cam Type: Hydraulic Flat Tappet
• Cam and Lifter Kit Upgrade: CL12-602-4
• Camshaft Gear Attachment: 3-Bolt
• Camshaft Material: Cast Iron
• Camshaft Series: Thumpr
• Engine Family: Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
• Exhaust Duration at .050 inch Lift: 257
• Exhaust Valve Lift: 0.486
• Grind Number: 295TH7
• Intake Duration at .050 Inch Lift: 243
• Intake Valve Lift: 0.5
• K-Kit Upgrade: K12-602-4
• Lifter Type: Hydraulic Flat Tappet
• Lifters Included: No
• Lobe Separation: 107
• Usage: Street/Strip
• Valve Springs Required: Yes

Extended Information:

• Country of Origin: United States
• Emissions : EPA Eligible

Packing Information:

• Quantity of Each: 1
• Package UOM: EA
• Dimension: 24.2 x 2.9 x 2.6 inches
• Weight: 8.7744 POUNDS