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COMP Cams

SKU 11-602-8

COMP Cams 11-602-8 Big Mutha' Thumpr 243/257 Hydraulic Roller Cam for Chevrolet Big Block 396-454

Name: COMP Cams 11-602-8 Big Mutha' Thumpr 243/257 Hydraulic Roller Cam for Chevrolet Big Block 396-454
Brand: COMP Cams
SKU: 11-602-8
Price: 549.95 USD
Availability: InStock

$549.95 USD

Out of Stock

This product is currently out of stock. It will be placed on backorder, and shipping can take 2 or more weeks to fulfill your order. and we will notify you as soon as it is back in stock.

Free shipping over $80 To the USA

Warranty 12 Months

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Enter your Engine Family Number and we will confirm whether this exact converter is street-legal for your vehicle.

Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.

Big Mutha' Thumpr 243/257 Hydraulic Roller Cam

Specifications

Camshaft Series	Thumpr
Advertised Exhaust Duration	319 DD
Lobe Separation	107 DD
Intake Valve Lift	0.57 IN
Exhaust Valve Lift	0.554 IN
Lifters Included	No
Valve Springs Required	Yes
Assembly Lubricant Included	No
Camshaft Gear Attachment	3-Bolt
Camshaft Material	Austempered Ductile Iron
Engine Family	Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)
Cam, Lifter and Gear Drive Upgrade	GK11-602-8
Cam and Lifter Kit Upgrade	CL11-602-8
K-Kit Upgrade	K11-602-8
Lifter Type	Hydraulic Roller
Usage	Street/Strip
Cam Type	Hydraulic Roller
Grind Number	299THR7
Basic Operating RPM Range	2,500-6,100 R3
Intake Duration at .050 Inch Lift	243 DD
Exhaust Duration at .050 inch Lift	257 DD
Advertised Intake Duration	299 DD
Grind Number	299THR7

⚠️ California Proposition 65 Warning
California Residents: This product can expose you to chemicals which are known to the State of California to cause cancer or other reproductive harm. Please visit www.p65warnings.ca.gov for more information.

Warranty: 12 Months

Sold by Specification. This is an engine build part, chosen by its measurements rather than by year, make and model. Match the specifications to your build. If you are unsure, check with your mechanic or dealership. Making sure it fits is the customer's responsibility.

A vehicle fitment list isn’t available for this part.

Please check the product description for the manufacturer’s application details, or ask a specialist — we’ll confirm whether it fits your vehicle before you buy.

Shipping Information

Free shipping is available for eligible orders.

Shipping: Free to the USA.

Orders are processed during normal business days. Delivery dates may vary by carrier and destination.

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