COMP CAM 11-601-4 MUTHA THUMPR 235/249 Camshaft Install Rebuild Kit | HP Springs | Lifters | Gaskets | Push Rods | LIFT: .510/.495 | FITS: 1970-90 Chevrolet BBC Big Block 454 7.4L V8 | Rough Idle
$685.00
Brand: REDLINE ENGINE SUPPLY
Condition: New
– The “Mutha” of All Idles (107 LSA): With a tight 107-degree Lobe Separation Angle and extended overlap, this cam produces a severe, heavy-loping idle. Why Buy It: This is the sound of pure horsepower. It is significantly rougher and louder than the standard Thumpr, giving you maximum “Pro-Street” credibility.
– High-Performance Power Band (235/249 Duration): Featuring a duration of 235 Int / 249 Exh @ .050”, this cam shifts the power curve to 2,200-5,900 RPM. Why Buy It: It is perfect for weekend warriors and street/strip cars that need explosive mid-range acceleration and top-end passing power.
– Aggressive Lift Profile (.510”/.495”): The intake lift breaks the .500″ barrier at .510”, with an exhaust lift of .495”. Why Buy It: This aggressive geometry maximizes cylinder filling on modified heads. Tech Tip: Ensure your valve springs can handle .510″ lift to prevent coil bind.
– 1) COMP CAM 11-601-4 MUTHA THUMPR 235/249 HYDRAULIC CAMSHAFT – 2,000-5,900 RPM OPERATING RANGE. VALVE LIFT: 0.510″/0.495″. 235/249 DURATION AT 0.050″. 107 LOBE SEPARATION.
– (16) ENGINETECH HIGH-PERFORMANCE HYDRAULIC LIFTERS
- 2 years warranty
- Delivery time: 1-2 business days
- Free 90 days return
Description
Description
If the standard Thumpr isn’t enough to scare the neighbors, it is time to step up to the Competition Cams 11-601-4 Mutha Thumpr Camshaft. Designed for the Big Block Chevy (396-454ci) owner who wants maximum intimidation, the Mutha Thumpr delivers a sound profile that is downright nasty. This isn’t a mild street cam; this is a high-performance hydraulic flat tappet grind engineered to make your Chevelle, Camaro, or Pro-Street truck sound like a dedicated drag car. If you want that heavy, chopping idle that shakes the ground and turns heads from three blocks away, this is the camshaft that delivers the goods.
The specs on the 11-601-4 take performance to the next level. Competition Cams engineered this profile with a massive Duration @ .050 of 235 intake and 249 exhaust, paired with a valve lift of .510”/.495”. This increased duration pushes the power band higher, dominating the 2,200 to 5,900 RPM range. This means you aren’t just making noise; you are making serious horsepower in the mid-to-upper RPM range. It is the ideal choice for modified engines with aftermarket intakes, headers, and free-flowing exhaust systems that can handle the increased airflow.
How does it feel? It feels violent. The signature 107-degree Lobe Separation Angle (LSA) combined with the increased overlap creates a rough, surging idle that vibrates the entire chassis. On the street, once you flash the converter, the power hits hard and pulls relentlessly to the redline. Critical Tech Note: Because of the aggressive duration, this cam produces lower vacuum than stock. It requires a 2,500+ RPM stall converter and performance rear-end gears (3.42-4.11) to drive properly. It is not compatible with a stock torque converter!
Why choose the Mutha Thumpr? Because you want the ultimate combination of sound and street/strip performance. Competition Cams created this series for hot rodders who refuse to compromise on attitude. You get the reliability of a hydraulic flat tappet setup with the audio profile of a radical solid lifter race engine. Don’t just build an engine; build a beast. Install the 11-601-4 Mutha Thumpr and own the loudest, meanest Big Block in town.
Manufacturer: COMP CAM / ENGINETECH
Model: MUTHA THUMPR 235/249 INSTALL KIT
Included components: 1-CAMSHAFT 16-LIFTERS 16-SPRINGS 16-PUSH RODS 1-GASKET SET 2-HEAD BOLTS
Warranty: LIFETIME – IF INSTALLED BY A CERTIFIED MACHINIST
Additional information
Additional information
| Brand | REDLINE ENGINE SUPPLY |
|---|---|
| Condition | New |
| Manufacturer | COMP CAM / ENGINETECH |
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