Camshaft - Thumpr - Hydraulic Flat Tappet - Lift 0.491 / 0.476 in - Duration 278 / 296 - 107 LSA - 2000 / 5800 RPM - Oldsmobile V8 - Each

T 226/241 HFT Olds

Thumpr 226/241 Hydraulic Flat Cam for Oldsmobile 260-455. High performance street, stock converter ok, best with 2000+ converter and Gears. Choppy/thumping idle.

Additional Information

High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle.

Application Summary

Fits 1967+ Oldsmobile 260, 307, 350, 403, 400, 425 and 455 V8

Part Type

Engine Camshaft

Product Overview

*Thumpr Camshafts*
• Three unique cam designs for each application that deliver excellent horsepower gains and broad torque curve; perfect choice for muscle cars and street rods
• Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note
• Best with aftermarket converters and more rear gear

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

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Product Details

Product Downloads

#	Document Type	Download
1.	Catalog

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Cam, Hydraulic Flat Tappet, Advertised Duration 278/296, Lift .491/.476, Oldsmobile, 260-455, Kit

COMP Cams is bringing the musclecar sound back, and it's nastier than ever! Few things grab our attention at a car show or cruise-in like a thumping, high performance idle. In fact, one of the most frequent questions from customers is, "What camshaft will give my car that mean-sounding idle?" For the performance and sound you demand, COMP Cams engineers introduce the Thumpr camshafts—a new series of hydraulic flat tappet cams. The lobe profile and grind characteristics of Thumprs use a combination of early exhaust valve opening, long exhaust duration, and a generous amount of intake and exhaust overlap—to maximize the rough-idling characteristics of the cams. They give you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in several grind profiles; each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range.