Comp Cams Thumpr Camshafts 4.6L 3V (05-10 GT/Bullitt)

2 Review(s)
Part Number: 427 127010
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Ford built a great car in the 2005-2010 S197 Mustang, but with a little help from COMP Cams it can sound and perform like a real "hot rod". The Thumpr Ford 3 Valve Cam Sets for 4.6L/5.4L Modular 3 Valve Engines deliver a great idle with excellent power. Good mid-range torque & power gains above 4500 rpm. Compatible with stock valve springs, converter & gears, and requires cam phaser upgrade & custom tuning.These cams will turn your naturally aspirated or blower-equipped Ford 3 valve engine into a performance machine with a minimum of installation difficulty; only requiring the addition of the COMP Cams Cam Phaser Limiter Kit (#5449) and computer tuning. The COMP Cams Cam Phaser Limiter Kit (#5449) safely modifies the factory variable cam timing (VCT) system allowing for the use of aggressive camshaft lobe technology without sacrificing the benefits of the VCT. Extensive testing of these new camshaft combinations has confirmed repeatable power gains of 25+ rear wheel horsepower with no sacrifices in long term durability.

Product Benefits
  • Delivers an aggressive "thumping" exhaust idle
  • Generous power gains in the middle & upper rpm range
  • Aggressive camshaft lobe technology without sacrificing the benefits of the VCT

CA Residents: Cancer and Reproductive Harm WARNING

Fitment & Features


Manufacturer: Comp Cams

Installation Information:

Level of Difficulty: Medium
Install Time: About 10 Hours
Tools Required: Basic Shop Tools

Vehicle Fitment:

Fits Model Year: 2005, 2006, 2007, 2008, 2009, 2010

Customer Reviews

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Average Customer Ratings


That lopey idle!
Wow what an amazing idle the car has now! Turns heads at every stop light...
Did you find this helpful?  2 of 2 Found Helpful
from Georgia on 5/7/2014
Sounds great!
Lopey idle sounds great! Cam phasers not compatible with 2010 models. Ford changed the phaser in '10 and it does not have the notch that the limiter slides into. Comp says they won't redesign a new limiter for such a short production run item since the 5.0 came out the very next year.
Did you find this helpful?  2 of 2 Found Helpful
from Texas on 4/27/2012
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