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From the manufacturer
Be Loud. Get Noticed.
If you're a true performance enthusiast, you just can't help be a little envious when you hear a Thumpr cam by COMP Cams. Nothing turns heads at a car show or a cruise-in than the sound of a hard hitting, high performance idle.
The COMP Cams engineering team called upon 30+ years of design experience to develop the Thumpr series of camshafts. The result of this effort is a series of performance camshafts that deliver the ultimate in modern performance and an incredible exhaust note.
Great Sound. Great Performance.
The Sound
COMP Thumpr camshafts use an early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note.
Performance
COMP developed the Thumpr, Mutha' Thumpr and Big Mutha' Thumpr cam grinds to not only make a great idle sound but also to produce a significant gain in both horsepower and torque.
Unique Grinds for Unique Rides
COMP has three different grinds for different performance applications from lower compression builds to higher compression engines in cars with looser torque converters and lower gear ratios.
COMP offers the Thumpr, Mutha' Thumpr and Big Mutha' Thumpr to handle applications from pump gas street cars to high compression applications. All offer a thumping idle with great performance.
Big Sound. Big Power.
- Three unique cam designs that deliver excellent horsepower gains and broad torque curve
- Early intake opening and long exhaust duration create overlap for hard-hitting exhaust note.
- Best with aftermarket converters and more rear gear.
- 1-8-4-3-6-5-7-2 Firing Order
- OE Hydraulic Roller
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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