COMP Cams Camshaft C409 47S291THR8

COMP Cams is well-known for making serious performance parts for a wide range of engines. This Mutha' Thumpr 4/7 Swap camshaft is a prime example, built for Chevrolet 348 and 409 big-block engines. If you're looking to build a high-performance street or strip engine, this hydraulic roller camshaft is designed to give you a noticeable bump in power.

This camshaft features a 4/7 swap design, which helps to improve exhaust scavenging and can lead to better cylinder filling. With a duration of 235 degrees on the intake and 249 degrees on the exhaust, it's built for aggressive performance. To get the most out of this cam, you'll want to pair it with at least 9:1 compression, a torque converter with a 2500 RPM stall speed or higher, and you'll definitely need to upgrade your intake manifold, gears, and headers. Expect a rough idle, which is characteristic of cams with this level of performance tuning.

Keep in mind that this camshaft is not CARB approved and cannot be shipped to California. It's a serious performance part for dedicated builders who want to extract maximum power from their Chevrolet 348-409 engine.