Thumpr Hydraulic Flat Tappet Camshaft <br> 67-90 Oldsmobile 260-455

Description:

Big Mutha' Thumpr 242/257 Hydraulic Flat Cam for Oldsmobile 260-455. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle.

Features:

Camshaft Series: Thumpr

Lobe Separation: 107 DD

Intake Valve Lift: 0.512 IN

Exhaust Valve Lift: 0.497 IN

Lifters Included: No

Valve Springs Required: Yes

Assembly Lubricant Included: Yes

Camshaft Gear Attachment: 1-Bolt

Camshaft Material: Cast Iron

Engine Family: Oldsmobile 260-455 c.i. 8 Cylinder (1967-1990)

Cam and Lifter Kit Upgrade: CL42-602-5

Usage: Street/Strip

K-Kit Upgrade: K42-602-5

Lifter Type: Hydraulic Flat Tappet

Cam Type: Hydraulic Flat Tappet

Grind Number: 295TH7

Grind Number: 295TH7

Basic Operating RPM Range: 2,500-6,400

Intake Duration at .050 Inch Lift: 242 DD

Exhaust Duration at .050 inch Lift: 257 DD

Advertised Intake Duration: 294 DD

Advertised Exhaust Duration: 312 DD

Package Includes:

Engine Camshaft