Thumpr 243/257 Hydraulic Flat Cam For Chevrolet Big Block 396-454

Thumpr 243/257 Hydraulic Flat Cam for Chevrolet Big Block 396-454. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle. BBC 1965-66 396 c.i.d. models have an oiling groove in the rear journal. The listed part numbered cams will not fit these models, so if you require a Camshaft with the oiling groove, please call us and we will assist you with placing an order. Vehicle Specific

• Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts

Attributes:

• Brand Name: COMP Cams
• GTIN: 00036584176374
• Advertised Exhaust Duration: 313
• Advertised Intake Duration: 295
• Amazon ASIN: B002EE4IDU
• Assembly Lubricant Included: Yes
• Basic Operating RPM Range: 2,300-6,200
• 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: GK11-602-4
• Cam Type: Hydraulic Flat Tappet
• Cam and Lifter Kit Upgrade: CL11-602-4
• Camshaft Gear Attachment: 3-Bolt
• Camshaft Material: Cast Iron
• Camshaft Series: Thumpr
• Engine Family: Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)
• Exhaust Duration at .050 inch Lift: 257
• Exhaust Valve Lift: 0.507
• Grind Number: 295TH7
• Intake Duration at .050 Inch Lift: 243
• Intake Valve Lift: 0.522
• K-Kit Upgrade: K11-602-4
• Lifter Type: Hydraulic Flat Tappet
• Lifters Included: No
• Lobe Separation: 107
• Usage: Street/Strip
• Valve Springs Required: Yes

Extended Information:

• Country of Origin: US
• Emissions : CARB Eligible

Packing Information:

• Quantity of Each: 1
• Package UOM: EA
• Dimension: 24.5 x 2.9 x 2.1 inches
• Weight: 10.7145 POUNDS