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White Box

White Box Transmission Crossmember

1973-1976 Mopar A-Body Transmission Crossmember for Gen III Hemi Swap - Fits A727, NAG1 Automatic Transmission and Tremec TKX 5 SPEED Manual (GM style) Transmission

Part # WB130033

White Box Transmission Crossmember

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Emissions

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

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White Box engine swap mounts allow easy installation of the Gen III Hemi engine in your 1973-1976 Mopar A-Body. These engine-Mount assemblies are part of an engineered solution that works together with the transmission crossmember and headers to optimize the engine placement & component clearances along with ideal drivetrain / U-joint operation angles. The engine placement eliminates modifications to the firewall and the engine mounting brackets fit the K-member on cars that originally came from the factory with a V8 engine. Firewall clearance provided for the use of Short Runner Valve (SRV) intake solenoid (no need to lock valve and sacrifice top end performance). Use with 2009 & up 5.7L, 6.2L, or 6.4L car style factory accessory drive system (variable valve timing accessory drive system with low mount alternator), or Holley Mid-Mount accessory drive system.

Features:

  • Crossmembers Accommodates Popular A727, NAG1, and Tremec TKX (GM Style) Transmissions
  • Uses the Factory Mounting Holes - for Easy Installation
  • High Tuck Design to Maximize Ground Clearance
  • Accommodates Up to 3” Exhaust
  • Uses GM Style Transmission Mount - Hooker Part# 71223029HKR or 71223030HKR (Sold Separately)
  • Modular Design with Bolt-on Transmission Adapter Allows Future Transmission Swaps without Replacing the Crossmember
  • Welded Steel Construction w/ Raw Unpainted Finish for Great Value
  • Heavy Duty 3/16” Steel Construction - for Strength & Durability
  • Includes Mounting Bolts & Instructions

About White Box

White Box offers budget-conscious solutions for engine swaps, exhaust systems, headers, fuel pumps, and even traction bars. Shop now at Holley.com!

Application1973-1976 Mopar A-Body
Brand White Box
ColorRaw
Discount Percentage5-25%
Emission Code3
6
FinishRaw
MaterialSteel
Motor TypeChrysler Gen III Hemi
Product TypeTransmission Crossmember
TransmissionA727
NAG1
TKX Chevy
Type of ComponentTransmission Crossmember
UPC090127119563
Part NumberWB130033
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This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.


The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle


WARNING: It is against the law to install this part on an Emissions Controlled Vehicle


The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
Instructions for Part# WB130033
Use with Engine Mounting Brackets WB130032 and Polyurethane Transmission Mount 71223029HKR (Black), or 71223030HKR (Red). Use with Drivers Side Mounted Starter on NAG1 transmission - to Avoid Clearance Issues with the Factory Steering System. This Crossmember Requires Transmission Specific Adapter Plate (sold separately) WB130034 A727 / (GM style) TKX Transmission Adapter* WB130035 NAG1 Transmission Adapter WB130042 NAG1 Torsion bar support (Provides Additional Support for Transmission Tunnel and torsion bar crossmember) *WB130046 TKX 5 Torsion bar support (Provides Additional Support for Transmission Tunnel and torsion bar crossmember)* *Use with Bell-Housing RM-8079 & TKX (GM Style Transmission) Transmission tunnel and Torsion bar support modifications are required to install the WB130042 or WB130046 Crossmember support.

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*Free Shipping & Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

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