Quick Spool Dump Valve Kit Turbo 400 & Powerglide Transmissions

MMR QSS (Quick Spool System) Ever Wonder how Team MMR spools 2 gigantic 88mm Turbos with just 5.8 Liters / 351 Cubic Inches - Read More >> The MMR quick spool system is a easy to install pressure relief / dump valve system for all Turbo 400 and Powerglide Transmissions. At the flip of a switch, timer or digital output, this system dumps converter outlet pressure loosening the converter and helping spool the turbo super fast. Although this idea is nothing new MMR has put the system together in in an easy to install kit. Developed in part with Pro Mod racer and tuner Brad Personett. This system can be wired directly to the transbrake wire to reduce spool time by up to 60%!! . It can be used as a tuning tool down track also to help get through poor track conditions by loosening the converter and allowing a controlled slip. And for the hard core racers that do not have the time to change converters at the track this system is the answer. Need to fine tune the system? Restrictors can be added to the line.

Simple install (kit gets T'd into existing cooler inlet and oulet lines using supplied T fitting).

Kit includes all parts needed for install. (switch, timer or digital controller sold separately). Approx. 1.2 Amp Draw (minimal), easy 2 wire (power and ground) hook up. Kit can be adapted for MANY configurations, transmissions and space restraints (solenoid valve can be moved if your transmission tunnel is too close)


MMR Custom High Heat/High flow Transmission Solenoid Made in USA

MMR Billet Servo Cover (powerglide version includes weld on fitting for oil pan return line) Made in USA

T fitting for external oil cooler circuit (can be used with or without oil cooler)

Black Braided High Heat stainless steel AN Hose and Fittings


Used by Team MMR to run 3.80's @ 208+mph 1/8 mile and 5.80's @ 256mph 1/4 mile!!

WARNING!! Like any race component, You must routinely monitor transmission temperatures and hose condition!!. Repeated transbrake use generates heat that can degrade hose condition eventually causing it to fail! Lines and fittings are a wearable item and should be checked and replaced routinely.

  • Model: QSS
  • Manufactured by: MMR

$199.99  $159.99
Save: 20% off

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