Quick Time Bellhousing - Mazda

Perfect fit for 13B/20B Mazda RX7s with Muncie/Jerico-style transmissions

PART# RM-4093

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Full Engine Plate and Grade 8 Bolts Included


This bellhousing fits Mazda RX7 13B/20B to Muncie/Jerico transmissions. Ideal for drag strip, circle track and high performance street applications.


  • Patent on 16 points of Bellhousing Design & Process
  • Built from high grade steel - work hardened to over 80,000 PSI strength. Over two times the strength of typical steel bellhousings.
  • Bellhousing cone is spin formed not rolled or stamped. This process provides consistent wall thickness and incredible strength.
  • Laser cut components are added to assembly and CNC machined with extreme precision to provide a bellhousing that is parallel & centered to within .003 in.
  • Precision manufacturing method permits Quick Time bellhousings to be the most dimensionally stable bellhousing available, permits less drivetrain wear.
  • Designed to be the lightest, strongest and most accurate bellhousing available.
  • Requires Automatic style starter.


BrandQuick Time
Certification6.1 SFI
Clutch7.25" Clutch Disc
Clutch Diameter7.25 inch
Clutch OperationHydraulic
Emission Code5
EngineMazda 13B
Mazda 20B
Engine MakeMazda
Flywheel125 Tooth
Height6.3 inch
Product TypeBellhousing
SFI Certification6.1
Trans Bore4.688
Trans. Bore Diameter4.685 inch
TransmissionBert Racing
Brinn Racing
TKO 500/600 Chevy
Transmission TypeManual
Part NumberRM-4093


This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

Full Engine Plate and Grade 8 Bolts Included

    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.