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Comp Cams Mutha Thumpr NSR 234/254 Hydraulic Roller Camshafts (05-10 Mustang GT)

Item 30138
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$924.95 (pair)

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      Video Review & Installation

      Hey, Justin with here, taking a closer look at the Comp Cams Mutha Thumpr Camshafts available for the 3-valve motor found in all 2005 to 2010 Mustang GTs. A set of new cams for your 4.6L is just one of many different ways to pull more power out of your 3-valve motor. Now if you're looking for more ways to increase the horsepower and torque in your Mustang, go ahead and click on the link below to subscribe to our YouTube channel or you can check out many of our different builds, including one very nasty 3-valve named Project Grabber Boost. Comp is one of those names that just about every Mustang fan should be familiar with. They've been producing quality camshafts and valve train components for over 35 years, making them one of the best in the biz. The Thumpr series camshafts are just one of many different cams offered by Comp and will give your GT a serious hot rod idle thanks to long exhaust duration along with some nice performance gains without having to replace your stock valve springs or retainers. In fact, Comp says that the Mutha Thumpr here is the largest cam they offer for the stock heads that will give you some nice performance gains throughout the entire power band but they really shine above 4900 RPM. In fact, go ahead and click on that link below to check out some of the customer reviews about these camshafts. While you're there, you can actually check out a video that one of our customer's link to his own ride, which will give you a good sense of how your idle will be with these cams in your 4.6. I do want to point out that, in addition to the cams themselves, you will need to pick up Comp's Cam Phaser Limiter kit, which is available from a drop down tab located on the product page. This allows your motor to still retain the use of its variable valve timing but will limit the total cam timing to prevent any piston to valve contact since the 3-valve is an interference motor. In addition to the Cam Phaser Limiter kit, of course you will need it custom-tuned, which is available from the bandwidth performance team. Installing a new set of cams along with the limiter kit is a job that should ultimately be left up to your local mechanic or speed shop due to the complexity of the work. On the other hand, if you're the type of person that likes to tackle any and everything with your ride, then go ahead and leave yourself about a full-day in the garage to get the job done. If you should have any questions about the install or about the Comp cams in general, you guys should know what to do by now. Hit us up with our 800 number or feel free to write us an email. If you've been looking to cam your three-valve and you wanna run the biggest possible cam with the stock heads, valve spring or retainers still in place, look no further than Comp Cams Mutha Thumpr Camshafts available right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Very Rough Muscle Car Idle
      • Biggest Cam Available for Stock Heads
      • Great Power Above 4900 Rpm
      • No Springs Required ("NSR") - Compatible W/Stock Valve Springs
      • Fits 2005-2010 4.6L GT and Bullitt


      Mutha Thumpr. Comp Cams Mutha Thumpr Camshafts really live up to their name. These are the largest aftermarket camshafts you can run with the stock heads. These Comp Cams produce great power gains over 4900 RPM's with a very rough muscle car idle.

      No Springs Required. These cams are compatible with your stock valve springs, so there's no need to remove and replace your 24 stock springs, saving you time and money.

      Application. Comp Cams Mutha Thumpr Camshafts are sold as a pair for your 2005 to 2010 3V 4.6L modular powered Mustang, including both the GT and Bullitt models.

      Technical Note. The installation of these Comp Cams will require a phaser limiter kit and custom ECU programming.



      Comp Cams 127020

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Camshafts

      Tech Specs

      Comp Cam Data Sheet
      Part Number: 127020 Grind Number: MT273LL
      RPM Range: 750 to 6600 Engine Type: FORD 4.6 and 5.4 SOHC MODULAR 3-V
      Lobe Sep Angle: 109

      Intake Exhaust
      Duration: 273 306
      Duration @ .050" Lift: 234 254
      Valve Lift: 0.45 0.45

      Customer Reviews (77)

        Questions & Answers

        10 More Questions

        Will It Fit My Mustang

        • Bullitt - 08, 09
        • GT - 05, 06, 07, 08, 09, 10

        Fits 2005-2010 4.6L Three Valve Mustangs Only

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