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Prothane Bullet Motor Mounts (05-09 GT, V6)

AmericanMuscle no longer carries the Prothane Bullet Motor Mounts (05-09 GT, V6). Please check out 2005-2009 Mustang Motor Mounts for an updated selection.
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AmericanMuscle no longer carries the Prothane Bullet Motor Mounts (05-09 GT, V6). Please check out 2005-2009 Mustang Motor Mounts for an updated selection.

Features & Details

  • Reduce Vibration and Drive Line Movement
  • Billet Aluminum and Polyurethane Construction
  • Includes Driver and Passenger Side Mounts
  • Fit 2005 to 2009 V6 and GT Mustangs
Reduce Vibration. The factory motor mounts use rubber bushings that deteriorate over time causing excessive engine and drive line vibration, but Prothane Bullet Motor Mounts use polyurethane bushings to effectively reduce vibration and will last years longer than rubber.

Quality Construction. Crafted from billet aluminum and polyurethane these Prothane Mustang Motor Mounts are much stronger and lighter than their stock rubber and steel counterparts to give you years of trouble free driving.

Application. These Prothane Bullet Motor Mounts are designed for use on the 2005 to 2009 Ford Mustang with either the 4.0L V6 or 4.6L V8 motor, including the V6, GT and Bullitt models.
What's in the Box
  • (2) Motor mounts
  • (2) Washers
  • (2) Bolts
Installation Info

Most Helpful Reviews

The Vibes!!

These motor mounts are great if you are driving a weekend race car, however, if you installing on a daily driver they will drive you crazy. I'm not a fan of vibes at idle, and these sure cause a lot. You ...

Read More
Helpful (8)

Massive positive improvement over stock

These mounts are very outstanding. Before I replaced the stock mounts I would frequently have a loud clunking sound when shifting, and could feel the engine and drivetrain moving around as the load changed. ...

Read More
Helpful (5)

Overall Rating 4.5 out of 5 stars
Read All 19 Reviews

Customer Photos (6) Submit Your Photo

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3 Questions / 5 Answers

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Clearance with Whipple S/C I have whipple installed on my 05 gt top clearance any issue? BBK long tube headers with catted shorty x pipe. Any problems here? Not worried about shake at idle. Between the twin disk clutch and cams doubt any new shake would be noticed.


  • I tried these mounts when I installed a new set of JBA ceramic long tubes and the vibration was enough to drive one crazy, especially at idle. I changed them out and went back to OEM, problem solved and a lession learned.


Show 1 more answer Helpful (1)

Application for supercharg mustang ( roush mustang) To it may concern , I would like to know if use these engine mounts on a Roush Stage 3 Mustang 4.6 . 1. Will this mounts allow hood clears for the supercharger? 2. Will their be more engine vibration while driving with these mounts? THANK YOU for your time and cooperation. Garry


  • 1. Probably, however you should measure just to be sure. 2. I have noticed reduced vibration and noise compared to the stock mounts with these.


Show 1 more answer Helpful (1)

Do the Prothane Bullet Motor Mounts (05-09 GT, V6) Item#: 47407 also fit 13 GT? I looked at the mounts "SR PERFORMANCE BILLET ALUMINUM ADJUSTABLE MOTOR MOUNTS (05-14 GT) Item #100544", but they are out of stock.


  • The Prothane Bullet Motor Mounts (05-09 GT, V6) will not fit the 2013 mustang. These will only fit the 05-09 4.6L, 4.0L motors.


Helpful (0)

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Customer Reviews (19) Write a Review

Overall Rating 4.5

out of 5 stars

  • 3/5

    December 08, 2011

    The Vibes!!

    These motor mounts are great if you are driving a weekend race car, however, if you installing on a daily driver they will drive you crazy. I'm not a fan of vibes at idle, and these sure cause a lot. You can immediately see the improvements they make, but I didn't think sacrificing drive quality was worth it.


    Year: 2007 Submodel: V6 Plano, TX

    Helpful (8)

  • 5/5

    September 03, 2012

    Massive positive improvement over stock

    These mounts are very outstanding. Before I replaced the stock mounts I would frequently have a loud clunking sound when shifting, and could feel the engine and drivetrain moving around as the load changed. However since installing these mounts the rocking when changing load on the drivetrain and engine has stopped completely. They also give my car a more performance oriented look underneath compared to the stock mounts. I cannot say how difficult these are to install, I had them installed at a shop when I had other work done.


    Year: 2007 Submodel: GT United States

    Helpful (5)

  • 5/5

    August 25, 2012

    Prothane motor mounts on 05 GT

    To start off I'd like to say these mounts are a gorgeous piece. I opted to get these because of hard shifting from drivetrain flex, I paired them with the a k-member brace (with torque limiters) from CHE. And I must say it really firmed things up. I have had the k-member brace on for a month or so before the mounts, so I could compare just the brace vs brace and prothane mounts. Install was very straightforward just follow directions. I used a phonebook on the jack under the oil pan when i raised the engine. As far as NVH goes I haven't noticed very much, if any vibration after the mounts. Anyways I definitely recommend these, very nice. And as always perfect service from American muscle!


    Year: 2005 Submodel: GT

    Helpful (5)

  • 5/5

    September 06, 2011

    Much better then stock!!

    Installed these over the labor day weekend, install was pretty straight forward. Note: If you have JBA shorty headers it is not possible to remove the rear mount bolt from the top, it must be removed from underneath. After the Prothanes are installed the rear bolt is now visible and easy to get to since the smaller size. Also, the top allen keyed bolt cannot be installed with a regular allen wrench with these headers since one of the primaries are too close to get it on the bolt.


    Year: 2005 Submodel: GT Ottawa, ON

    Helpful (4)

  • 5/5

    October 20, 2012

    Prothane Mounts

    I was pretty nervous about getting them, because I heard reviews of them making our cars shake at idle... However, after installing, I see very minimum vibration at idle. It makes shifting and driving in general fun again.


    Year: 2006 Submodel: GT

    Helpful (3)

  • 4/5

    August 23, 2016

    Mounts improve overall performance

    The mounts installed easily (less than 1.5 hours) on my stock 2005 GT. The shifting from 2nd to 3rd gear improved, though the mounts did not eliminate all of the "notchy-iness" in my Hurst shifter. I can definitely tell there is less slop in the drive train when stepping on it - the response time to acceleration is better. The only bad thing so far has been the increased amount of vibration felt through the steering wheel, seat and floor when idling. No additional vibration noted while driving. I need to drive it more to see if the vibration at idle becomes a deal breaker for daily driving.


    Year: 2005 Submodel: GT

    Helpful (2)

  • 5/5

    May 20, 2015

    Raw Upgrade

    What you need to know: -These will work on 2011-2014 mustangs (my car is a 2012 GT). -Nicely made. -Moderate NVH increase = you will feel the engine at startup and idle (this is why I say "raw upgrade", which I think is cool); seems to be some natural frequency of the design/material that, at around 2,000 RPM you feel the vibration/firing of the engine and at idle with the AC on (this is what makes this a "moderate" increase to me); otherwise, slight NVH increase otherwise. -I forget I have upgraded mounts until cruising at 2,000 RPM or with the AC on at idle. -Seems to have helped make shifting a little more precise under high power demand.


    Year: 2012 Submodel: GT Clinton Township, MI

    Helpful (2)

  • 5/5

    April 25, 2014


    I installed these motor mounts when doing my BBK shorty headers. Killed 2 birds with one stone! I CAN NOT STRESS ENOUGH doing mounts with headers. WORD OF WARNING. when installing these mount with headers. Attach the mount to the bracket and tighten almost all the way. I only say this because there isn't a clear line from the top to tighten, and no clearance with a standard allen wrench either. Had to use a socket head allen with a ratcheting box wrench around the hex part of the socket to tighten down. If you still have OEM headers on, this is a ZERO issue. I don't know if it would be an issue with LT headers, but I am guessing it would be just as bad with them. You should have clear shot from the top. NVH, people freak when they see this, don't!! Is there greater vibration, YES!!! but its good! no Beach Boy jokes! I say good, simply because I feel more "connected" to the motor. I compare it to riding in an old school muscle car. If you want to maintain a more "luxury feel" stay OEM. I will say when at 35 MPH or more at lower rpm you still feel the vibration, but not like at idle/start up at all. I wouldn't hesitate to do a long road trip!!!! 65-75 mph feels like OEM are still installed for the most part(unless you stomp on it) . Some people are more sensitive to vibration so please keep this in mind. The shifting is also improved. 1-2, 2-3 is smoother an less "notchy" feeling. This makes sense, seeing as the new mount keep the engine from "jumping" all around when under load, which of course means the transmission stay put better now too! Great reduction in the drive line "clunk" when hitting the gas at speed. Isn't gone, but with that 2 piece drive shaft you will NEVER 100% eliminate it. It simply seems/feels less harsh, but that could just be me. Don't forget I did headers at the same time so some of my good vibes are a result of that as well, but I'm sure 90-95% of it is from the mounts. Still getting use to it myself, but I love the look on other peoples face who are sitting in the car when I start it. Not one person has felt the vibration was a bad thing. All have said something positive to date.


    Year: 2008 Submodel: GT Madison, WI, USA

    Helpful (2)

  • 5/5

    December 15, 2015

    Prothane Motor Mounts

    Needed these for my headers. Install was very forward. Instructions were included and clear. As for function- They are solid pieces. No flex of the engine. Shifts are now much firmer and solid. As for any concern of added NVH, there isn't much noticeable difference. The only vibration seems to be in the 1500 RPM range. Even then it isn't bad. Just a slight vibration. I would recommend these if just to firm up shifts and have a solid motor feel.


    Year: 2006 Submodel: GT El Paso TX

    Helpful (1)

  • 5/5

    December 02, 2014


    I had steeda adjustable mounts prior but decided to go for a simpler assy. These by far, incredibly upgraded the feel of the front end. Much more stable. Gear change is a breeze and vibrations not too intense. Power transfer is greatly augmentated. This is one of the best bolt on upgrades I've done. Around 2 hours to get done if you have adequate tooling.


    Year: 2008 Submodel: GT Miami, Fl.

    Helpful (1)

  • 1/5

    September 20, 2014

    Reduce vibration, ya right!

    I installed a new set of JBA ceramic long tubes and at the same time a set of these motor mounts. This caused the car so much vibration while idling, I could not stand and had to re-order and re-install a set of factory motor mounts, this cost me not only the price of these mounts and another $600.00 to go back to factory motor mounts, witch cured the vibration. May be suitable for stangs with a standard tranny, but my wife's automatic didn't like them one bit.


    Year: 2005 Submodel: GT Halifax, NS, Canada

    Helpful (1)

  • 5/5

    June 28, 2014

    Motor Mounts

    Did these with shorty header install. Love the way they look down there, If you enter car shows and your hood is up all day these are visible and look really nice.


    Year: 2008 Submodel: GT

    Helpful (1)

  • 5/5

    December 21, 2011

    Quality Product

    I have not installed these yet, no hurry because the cars put away for the winter. However these mounts look to be made realy well, and look to be high quality.


    Year: 2006 Submodel: Other Ontario Canada

    Helpful (1)

  • 5/5

    December 07, 2011

    Really well made product

    I am really impressed with the quality of these mounts. They look great and are really beefy. I am having the tops machined down a 1/2" to get a little more clearance between my supercharger and the hood. Overall a great product.


    Year: 2006 Submodel: GT Tucson, AZ

    Helpful (1)

  • 4/5

    January 22, 2017

    Stiffens up the engine

    My old mounts were torn and these were a perfect replacement. Extremely easy to install, and now you can actually feel your engine while your in the driver seat. I did notice that these mounts sit slightly higher than stock which is fine however I ended up having to fight a little with taking out my transmission later on because the bell housing didn't want to fully clear the body.


    Year: 2007 Submodel: GT

    Helpful (0)

  • 4/5

    June 21, 2016

    Comes with a price

    These motor mounts are really good. My Mustang used to feel as though something was pulling it back when changing gears. These have helped smooth that process and has lowered the chance of that happening. Very rarely have I felt that pull feeling. For the most part it is a smooth transition. With that being said I have noticed a bit of a trade off. When the car is idle the RPMs will stay low and the car will shake. Only after putting in the motor mounts did this start happening. So take this product with a grain of salt.


    Year: 2005 Submodel: V6

    Helpful (0)

  • 4/5

    April 14, 2014

    Easy Installation

    installed within an hour and a half. Look good. There is more feel to the engine under 2K.


    Year: 2007 Submodel: GT northwest Louisiana

    Helpful (0)

  • 5/5

    June 18, 2012

    Prothane Motor Mounts

    Easy installation, work great, beautifully finished. A must when installing headers.


    Year: 2008 Submodel: GT Marysville, WA

    Helpful (0)

  • 5/5

    December 02, 2011

    Finest Finish

    This product looks very nice but up to date I did not bolt it in because my engine under rebuild process.I hope it could hold the engine weight minimum 300lb + EDELBROCK SC weight 150lb.


    Year: 2006 Submodel: GT KSA

    Helpful (0)

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