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Comp Cams Mutha Thumpr Cams (05-10 GT)

24 Reviews
Our Price

$712.97

(pair)
  • Item #30138
  • MPN# 127020

  • Market Price $855.99
  • You Save 17% ($143.02)
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Product Videos Customer Photos
Features
  • 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
Description
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.

Fitment: 2005 2006 2007 2008 2009 2010 Details

What's in the Box
  • (2) Camshafts
Installation Info
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
Will it fit my Mustang?
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09, 10

Fits 2005-2010 4.6L Three Valve Mustangs Only

Most Helpful Reviews

5/5
Amazing sound!!!

I listened to a lot of videos on YouTube before and while I waited for the mother thumpr cams to arrive. I couldn't get over the sound difference in the videos. But that first time you fire it up and hear ...

Read More
Helpful (1)

5/5
GREAT CAMS

Great lope, really gives the car that sound of an old school hot rod. Felt the power gain right away, great bang for your buck. Had my shop do the install, took 7 hours to install, paid $700 for the install. ...

Read More
Helpful (1)

Overall Rating 4.9 out of 5 stars
Read All 24 Reviews

Review & Install Video

Customer Photos (6) Submit Your Photo

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17 Questions / 9 Answers

Ask a Question

How much horespower gain will i notice with this?

SawZaw08

  • I have these cams put on with a full exhaust, in order to get the real feel of these cams you need to have long tube headers, an X pipe or H pipe of some sort as well as axlebacks. It's a huge difference compared to the stock cams, so you'll be looking at real horse power gains with supporting mods of about 30 RWHP, which is alot more than you think it is!

    Sick06

    Good Answer (10) (1)

Show 2 more answers Question Resolved

Cams in everyday driver Can theses cams be used in a everyday driver without it being harsh on the motor

Jake9107

  • No problem with everyday driving. Good drive ability. Good power.

    bybyls1

    Good Answer (4) (1)

Show 2 more answers Question Resolved

Would these cams work with an auto trans?

Amkusdude

  • Yes. I have them in my 06 with an automatic trans. But I would recomend a 3000 stall converter.

    jonnyc1906

    Good Answer (3) (0)

Show 2 more answers Question Resolved

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Customer Reviews (24) Write a Review

Overall Rating 4.9

out of 5 stars




  • 5/5

    Installation Time: Afternoon

    May 26, 2016

    Amazing sound!!!

    I listened to a lot of videos on YouTube before and while I waited for the mother thumpr cams to arrive. I couldn't get over the sound difference in the videos. But that first time you fire it up and hear it you will smile ear to ear like the grinch that stole Christmas. Comp cams makes an amazing product and they do exactly as expected. You get a good little boost in performance as well as that nasty old school thump.

    Deuce

    Year: 2005 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2

    Helpful (1) (0)

  • 5/5

    Installation Time: Weekend

    August 05, 2014

    Great set of cams!

    I purchased these cams with the FRPP intake manifold and I gotta say, the car sounds and performs fantastic now that they're running a little smoother with everything and the tune is getting dialed in. I did all the installs myself ( also installed the required Comp Phaser limited kit and new Phaser bolts that are both available from American Muscle ) The install wasn't TOO bad and I had never tackled anything that intensive on an engine before ( let alone on my daily driver ) and even though the install wasn't the worst thing to do, I think the peace of mind alone is worth the price of paying an experienced shop to do the install for you. Everything ended up fine in my case, but I can see how that could have ended very badly and you have no one else to blame but yourself haha Some other things you will need to complete this install if you're feeling brave and adventurous is a timing chain wedge and a bottle of cam assembly lube. American Muscle does not sell a timing chain wedge and the cheapest I could find one was from Freedom racing. And the lube can be purchased at any auto parts store. Other than that, you don't need to spend the money on a valve spring compressor. Just loosen the bolts on the cam caps one at a time working from the inside out to relieve valve spring pressure. Leave the roller followers in place when you remove the stock cams. But yeah, great cams, and great service from AM as always!

    grabberbluemach

    Year: 2010 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 4 Pontiac, MI, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    July 28, 2014

    GREAT CAMS

    Great lope, really gives the car that sound of an old school hot rod. Felt the power gain right away, great bang for your buck. Had my shop do the install, took 7 hours to install, paid $700 for the install. And since you don't have to get new springs, you save even more money, a win, win situation. If you're looking for a great lope sound at idle than I highly recommend these Motha Thumpr cams.

    Aztecarex

    Year: 2005 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Austin, TX, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    January 10, 2012

    Monster Sound!!!!!

    My local speed shop suggested these cams to me when I was serious about upgrading. At first I was a little disappointed when I realized I would have to buy the additional component (Phaser Limiter Kit) and some new camshaft bearings. I must say though, I am VERY pleased I went with these over the traditional Ford Racing cams. These may not be a direct fit like the Ford Racing cams are, but they are bigger cams with a sick sound to them and they increased my horsepower BIG TIME. My stang is now a beast thanks to these cams!!!

    2006GT

    Year: 2006 Model: GT Driving Style: Show 'Stangs I have owned: 1 South East Texas

    Helpful (13) (0)

  • 5/5

    Installation Time: Full Day

    August 13, 2012

    Comp Cams breakdown.

    These cams are amazing!! They are a must for anyone looking for that extra power they are looking for in their S197. These cams have to have to meanest muscle car sound I have ever heard, i have got so many comments on this product that I'm starting to get annoyed! (In a good way) I had already put a full exhaust on my car so the outcome along with an offroad x pipe and catbacks make this thing sound so much more mean than it is! I would recommend this product to anyone looking for any HP gains what so ever. Thanks AM for making it easier to have a good time!

    Sick06

    Year: 2006 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 Kentucky

    Helpful (7) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    July 28, 2012

    these cams are the way to go!

    I had these cams installed and absolutely love them, particularly when I pull in and leave car shows. Everybody is looking around to see where the camming hot rod is coming from and realize it is a newer mustang. I can't leave without getting stopped with questions and admiration. If you want to be the unique mustang at a show or just cruising around, these cams are the only way to go, believe me, I shopped around for a long time and I know I made the right decision. http://www.youtube.com/watch?v=c0Wz_ZE4Igs

    garya

    Year: 2008 Model: GT Driving Style: Show 'Stangs I have owned: 1 oregon

    Helpful (13) (4)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    August 30, 2013

    Outstanding performance with supporting mods

    I just had these installed with 410 gears in my 08 GT and all I can say is WOW!! I can't say exactly what these cams gave me in horsepower numbers as I already had Pypes LT headers and ORX pipe, JBA axle back and Air Raid CAI installed when cam install was done. After dyno tune was complete, the car put down 363.94 rwhp and 342 torque at 6500 rpms. And did I mention that nasty lopey idle? Absolutely amazing!!! I Highly recommend these cams. And as always, AM came through again with very fast shipping.

    heavyfooted

    Year: 2008 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Newton, NJ, USA

    Helpful (5) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    August 25, 2012

    Comp Mother Thumper Cams

    These cams sound great and give the engine a whole new sound. I have enjoyed them so far!

    Jeff08

    Year: 2008 Model: GT Driving Style: Show 'Stangs I have owned: 5 Maryland

    Helpful (5) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    June 29, 2012

    Great old school sound

    Very happy with this install. Great sound, great performance. Gave my 05 that great old school sound. I've had lots of compliments. Very glad I decided to get this mod. Would recommend this product to anyone thats looking for a great sound and increased performance. I give it a +A.

    Chuck22

    Year: 2005 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Muscle Shoals, AL, USA

    Helpful (6) (1)

  • 5/5

    Installation Time: Afternoon

    April 02, 2013

    CAMMER LH

    CAMS ARE FAIRLY EASY TO INSTALL. THE PHASERS ARE A LITTLE TRICKY. THE SOUND WITH THE PYPES SHORTY HEADERS,X PIPE,AND VIOLATER MUFFLERS IS BETTER THAN I ANTICIPATED.NOTICED POWER INCREASE. OVER ALL GREAT PRODUCT.HIGHLY RECOMMENDED.

    FOURJ

    Year: 2008 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 5 MANY,LA

    Helpful (3) (0)

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