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Comp Cams Mutha Thumpr Cams (05-10 GT)

19 Reviews
Our Price

$716.99

(pair)
  • Item #30138
  • MPN# 127020

  • Market Price $824.53
  • You Save 13% ($107.54)
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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 factory 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 factory 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.

Mustang 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 Read All Reviews

Overall Rating 4.9/5 Write a Review
5/5
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)

Read More
Helpful (13) (0)

5/5
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

Read More
Helpful (7) (0)

Videos

Customer Photos (3) View All Customer Photos

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Q & A (15 Questions, 6 Answers) Ask a Question

Would these cams work with an auto trans?

Amkusdude Year: 2007 Model: GT

Question Resolved
Good Question (1) (0)
  • Yes. I have them in my 06 with an automatic trans. But I would recomend a 3000 stall converter.

    Helpful (3) (0)

    Best Answer

    jonnyc1906 Year: 2006 Model: GT

Show 2 more answers

What about with a turbo? I am looking to install these cams, because they offer the sound and idle I want. Because of their rotation duration though, would these cams be benificial if they were installed in a turbocharged engine. I friend said these were an N/A nitrous cam. I have a nitrous kit and plan on getting a turbo or a Procharger kit. Probably turbo. I just don't want to spend the time and money and it turns out I was better off with stock cams. I don't want all of my boost to go straight out the tailpipes. Thanks.

LandonAlexander Year: 2006 Model: GT

Question Resolved
Good Question (0) (0)
  • Yes, these will work OK for FI, but there are better cams for your application.

    Helpful (0) (0)

    AutoXRacer Year: 2008 Model: GT

    Top 10 Contributor

These Or Ford Racing Cams? I would like to know if the thumpr cams are better than the Ford Racing cams. The power gain is about the same I guess, but would like to know if one sounds better than the other, or if one plays better with the stock valve-train than the other. I have a Ford Racing cold air intake, long tube headers, high flow catted pipe, and Magnaflow mufflers with a performance tune.

StangManForever2008 Year: 2008 Model: GT

Question Resolved
Good Question (0) (0)
  • THE THUMPR IS AWESOME. got a great lope and sounds great. Highly recommend this cam. Put mine in a 05 Roush GT with a 4.6 and it is GREAT.

    Helpful (0) (0)

    Chuck22 Year: 2005 Model: GT

    Top 500 Contributor

Show 1 more answer

Reviews (19) Write a Review

  • 5 Stars .89 89%
  • 4 Stars .11 11%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.9

out of 5 stars

19 Customers Recommend this Product

Installation Time:Weekend

Installation Cost:$500-$1000

  • Performance Gain: 4.31579 4.3/5
  • Fit: 4.789474 4.8/5
  • Bang For Your Buck: 4.473684 4.5/5
Filter By Sort By
  • 5/5 Yes, I recommend this product

    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 Yes, I recommend this product

    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 Yes, I recommend this product

    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 Yes, I recommend this product

    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 Yes, I recommend this product

    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 Yes, I recommend this product

    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.

    Top 500 Contributor

    Chuck22

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

    Helpful (6) (1)

  • 5/5 Yes, I recommend this product

    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)

  • 5/5 Yes, I recommend this product

    April 19, 2013

    great choppy sound

    i only have stock exhaust anf a set of flowmasters outlaws axle backs installed with these cam and the car sounds amazing it sounds mean but isnt so loud u cant talk standing around it great buy for the money

    Top 1000 Contributor

    bigjohn420

    Year: 2007 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Gainesville, FL, USA

    Helpful (4) (1)

  • 5/5 Yes, I recommend this product

    January 19, 2014

    Amazing sound that will turn heads

    I got these cams put in last week. I have moved, so i couldn't do it myself so I had a shop do it. Besides the ford shop messing up and have to have my car there two days these cams are amazing. I have a Bama tune with these cams and it ties it all together. Make sure if you buy these cams you get the phaser kit and two cam bolts, the bolts only come one at a time so make sure you get two. After It was all done, the whole shop came over to check out the sound. It sounds like a cammed out muscle car now and really sets my mustang apart. I would strongly recommend these cams from AM.

    tleadbeater88

    Year: 2008 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 St. Johnsbury, VT, USA/Seatte

    Helpful (2) (0)

  • 5/5 Yes, I recommend this product

    October 22, 2014

    Thumpn down the road

    I already had the Ford Racing "Hot Rod" cams in my Mustang, but I wanted more thump. I knew the Comp cams were only a little bit more that my Hot Rod cams, but I wanted to try them anyways. The Hot Rod cams are awesome, lumpy with great power, but the Comp cams changed everything. More power on the top end (which I knew) and hit's later (rpms), the only benefit is the huge cam lobe at idle. Would I switch back???, no way...you can't beat the way everybody's heads turn when you drive up.

    APKG4U

    Year: 2008 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Rathdrum, ID, USA

    Helpful (1) (0)

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