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Comp Cams Phaser Limiter Kit (05-10 GT)

Item 30139
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      Review & Installation Video

      Product Information

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


      • Required for Installation of Comp Cams
      • Eliminate Piston to Valve Clearance Issues
      • Limits Cam Phasing to 20 Crank Degrees
      • Disassembly Tool NOT Compatible on 2008-2010 Models
      • Fits 2005-2010 Modular 3V 4.6L Engine


      Limits Cam Phasing. COMP Cams Phaser Limiters physically limit maximum cam phasing to 20 degrees to allow independent control over intake and exhaust centerlines and eliminate piston to valve clearance issues that can occur when installing larger aftermarket camshafts in the modular 4.6L engine.

      Eliminates Need For Custom Pistons. This set phaser limiters, with the proper tuning software, allow the OEM computer to independently control intake and exhaust centerlines to take full advantage of the benefits of Variable Valve Timing (VVT) when using aggressive aftermarket camshafts without the need to install custom pistons to eliminate valve clearance issues.

      Application. The Comp Cams Phaser Limiter Kit is specifically designed for use on 2005 to 2010 3 valve 4.6L powered Mustangs running aftermarket Comp Cams.

      Please Note. The included Cam Phaser Disassembly Tool is not compatible on 2008-2010 models.

      Fitment: 2005 2006 2007 2008 2009 2010 Details

      MPN# 5449

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (31)

      Write a Review

      Ratings Summary

      4.5 out of 5 overall rating from 31 customers

      Installation Time: Afternoon

      Installation Cost: $250-$500

      • July 15, 2019

        5 2008 GT - Chrisj

        Rebuilding the engine

        still rebuilding the engine. everything looks good

        Helpful (0)
      • April 17, 2019

        4 2008 GT - Pony89 Installation Time: Shop Install Installation Cost: $250-$500

        cam upgrade

        Good fit did the job that it was designed for. with cam upgrade.

        Helpful (0)
      • February 14, 2019

        5 2007 GT - JonathanR Installation Time: Less than 1 Hour

        Great addition car performs great

        Tool they co e with could be better ended up using a straight screw Sri we to push spring open to insert stop.

        Helpful (2)
      • February 05, 2019

        1 2006 GT - Ry Installation Time: Shop Install Installation Cost: $100-$250

        Great until you realize...

        Everything fit perfectly until you realize you’re missing the phaser bolts. @Americanmuscle please don’t say it’s a kit if you’re not going to include all the parts needed and let people know before they have to wait 3 extra days for the right parts to come in. Thanks.

        Helpful (3)
      • January 01, 2019

        1 2005 GT - Albert

        Parts blow gimme my money back

        Waste.of.time and money didnt even fit in the phasers and couldn't even get an email back thanks for taking my money

        Helpful (4)
      • December 03, 2018

        5 2006 GT - JasonK

        Need em

        These are a must have addition to a bigger cam shaft install

        Helpful (2)
      • November 04, 2018

        1 2008 Bullitt - Ranger05

        phaser limiter kit

        product worthless as is does not fit the 2008 Mustang Bullit addition. Yet you sell it as a kit.

        Helpful (2)
      • May 29, 2018

        5 2009 GT - David Installation Time: Less than 1 Hour

        09 improvise required

        My 09 GT/CS phaser spring did not match the instructions. The spring in the instructions should a spring that wrapped 180 deg around the pin. My phaser only made a 90 deg bend and the supplied tool would not work. I ended up clamping on to the spring end with vise grips, removing the pin bolt and manually unwrapping the spring. Installed the limiters and re-wrapped the spring and installed the pin. Be sure to not let the spring fling open, could damage the spring and hurt you too.

        Helpful (4)
      • April 05, 2018

        5 2005 GT - DavidO Installation Time: Afternoon

        Phaser Kit

        Phaser are doing there job. I guess because engine hasn't blown up. Lol. I recommend that if your engine has more then 100000 miles to replace the actual phasers. The performance shop that did the work had issues with due to there age. They should be theroughly inspected once engine is opened. The Thumper cam requires the phaser Kit but not all cams required it.

        Helpful (6)
      • March 31, 2018

        5 2006 GT - StephenN Installation Time: Less than 1 Hour

        Exactly as described

        Got these fast. Had good instructions went together fast and easy.

        Helpful (4)

      Questions & Answers (11 answers)

      5 Top Rated Questions

      If I understand this correctly, these physically limit the number of degrees that the cam phasing can be altered by the VCT system. If the PCM commands a higher phase change than these will allow, won't a fault code be generated?

      Hello I went to put the limiters in and no matter what position I turn it the bolt holes never line up and it wont fit in the phaser in any position do I have to remove something else?

      • Please, double check to see that the cam position sensor has been removed. If the sensor is not removed, the Cam Phaser Spring Lock Tool will hit it when the engine is turned over. For a full review, we do have an install guide for you to review here:

      Helpful (0)

      Will these limiters work on OE phasers, or should I be looking to replace them with something compatible?

      • The Comp Cams Phaser Limiter Kit is compatible with the OEM cam phasers.

      Helpful (0)

      Will I not need a disassembly tool for my 2009 gt? And can the car be "tuned" through bama or would I have to go and get it "computer" dunk tuned!

      • The Comp Cams Phaser Limiter Kit does not come with a specific tool to install them on a 2009 GT. We suggest having a professional shop install these parts. Bama will be able to tune for this Limiter Kit.

      Helpful (0)

      I have an 05 Mustang GT and I am replacing my cam phasers with Dorman 917-250XD, are there any issues installing the Comp Cam Phaser Limiter Kit-5449 with these cam phasers.

      • That Dorman part number appears to be a direct replacement for the OE timing sprocket. Since that would be the same as the factory sprocket, there should be no issues installing the Comp Cams Phaser Limiter Kit on to your Mustang.

      Helpful (0)
      Post Your Question
      6 More Questions
      What special tools would you use on a 2009 mustang, since the tools included doesn't work with 09-10. 1 answer
      Will this add horespower using stock cams? Or is this only needed when installing comp cams? 1 answer
      Does this part turn your engine into a non interference engine? 1 answer
      I noticed the product says 05-07 GT. My car being a 2008 GT, would I not need these? Or is there something else i should be looking for? I'm planning on installing the Mother-Thumper Competition cams soon and I'm trying to make sure I have everything necessary. Would you be able to shed some light on this mystery for me? 1 answer
      Do these phaser limiter kit come with all the bolts for install? 1 answer
      Would this be necessary for a set of ford racing hot rod cams on a 3v? If not would it still be beneficial to have installed with the Ford racing cams? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Phase Limiter Plates
      • Cam Phaser Disassembly Tool

      Tech Specs

      Will It Fit My Mustang

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

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