FREE 1 to 3-Day Delivery on Orders $149+ Details

Father’s Day Sale – Up to 40% Off! Shop Now >

MMR Billet Secondary Tensioners and XHD Chain Kit (96-04 Mustang Cobra, Mach 1; 07-14 Mustang GT500)Find parts that fit my vehicle

Item 486518
Product Image
Our Price

$813.99

Military, Medical & First Responders $40.70 Available in AM Cash Rewards.
Confirm Eligibility

CONFIRM THIS FITS YOUR VEHICLE!

Select a different vehicle Help?
Update or Change Vehicle
Add to Cart
Save for later
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    or use

    Shop Owners Save More! Sign up for our dealer program
    Join For FREE
    Loading Indicator

      Product Information

      Features, Description, Q&A, Specs & Installation

      Features

      • MMR Billet Passenger Side DOHC Secondary Tensioner And Heavy Duty Secondary Chain Kit
      • Factory Passenger Side Secondary Tensioners On All DOHCs Tension The Chain On The Wrong Side, Causing Cam Timing Errors Up To 7 Degrees Regardless Of Cam Degreeing
      • New Kit Properly Tensions Chain By Inverting The Tensioner To Reduce Timing Error To 1 Degree
      • Driver Tensioner Leaks Between Cylinder Head And Tensioner, Reducing Oil Supply To Camshafts And Cylinder Heads
      • O-Ring Seal Added To Address The Oil Leak Issue
      • Proper Chain Tensioning And Heavy Duty Chains Enable Accurate Cam Degreeing Every Time
      • Testing Shows 4-5 MPH Gains In The 1/4 Mile
      • Essential For Applications With Aftermarket Valve Springs And/Or Cams
      • Used By Team MMR To Produce 3000HP And 10,000 RPM
      • Features Rock Solid Timing Under All Operating Conditions
      • Severe Duty/Race Secondary Chains Eliminate Secondary Chain Failure
      • Anodized For Improved Corrosion Resistance
      • Plug And Play Installation, No Modifications Required
      • Fully Rebuildable With Replaceable Wear Strips
      • Includes Billet Secondary Tensioners For Driver And Passenger Sides, Upgraded Extreme Heavy Duty Secondary Chains, And ARP Hardware
      • Fits 96-04 Mustang Cobra, Mach 1; 07-14 Mustang GT500

      Description

      MMR Billet Passenger side DOHC Secondary tensioner and Heavy Duty Secondary chain kit.It has long been known that the factory passenger side secondary tensioners on ALL DOHC's tension the chain on the wrong side, this creates cam timing errors as great as 7 degrees (regardless of how the cams are degreed!) This new kit from MMR properly tensions the chain by inverting the tensioner and brings the margin of error down to a mere 1 degree.  The driver tensioner from the factory leaks between the cylinder head and tensioner, reducing oil to the camshafts and cylinder heads which cam create timiing variances and broken secondary chains, MMR has addressed this by adding a O ring seal. Properly tensioning the chain and adding the heavy duty chains allows you to degree the cams perfectly every time and testing has shown 4-5MPH gains in the 1/4 mile! A must for all applications with aftermarket valve springs AND / OR cams.Get your timing under control with this kit today- a must for any High HP application!! As used by team MMR to produce 3000HP and 10,000rpm. Features:Rock Solid Timing under all conditionsSevere Duty/Race Secondary chains eliminate secondary chain failureAnodized for corrosion resistancePlug and Play InstallFully rebuildable with replaceable wear stripsFits:*96-04 Cobra 4.6L*2007-2014 GT500 5.4L*5.4 DOHC Navigator 5.4L*03-04 Mach One and Aviator 4.6L*All Australian 4.6/5.4 DOHC ApplicationsIncludes:*Billet Secondary tensioners (driver & passenger side) PN# 444036 & PN#444038*UPGRADED XHD (Extreme Heavy Duty) SECONDARY chains pr. PN#487028*ARP Hardware

      MMR 444032

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      Tech Specs

      Questions & Answers

      No questions about this product yet. Ask the First Question

      Will It Fit My Mustang

      • Cobra - 96, 97, 98, 99, 01, 03, 04
      • GT500 - 07, 08, 09, 10, 11, 12, 13, 14
      • Mach 1 - 03, 04

          Mustang Categories

          Muscle Car Categories