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Hooker BlackHeart

Hooker BlackHeart Transmission Spacer

LS Engine Swap Crossmember Spacer for 4L60-4L70, TKO & Coyote Swap for TKO, and TR-3550 Transmissions

Part # 71223012HKR Be the first to write a review
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This transmission mount adapter kit has been comprehensively designed for use with Hooker Blackheart transmission crossmembers used in specific LS & Coyote engine swap applications. When used as instructed, this transmission mount adapter will provide engine/transmission inclination angles which are designed to provide optimized U-joint working angles and component clearances.


  • Facilitates installation of a GM 4L60-4L70, Tremec TKO 500/600, or TTR-3550 transmission in multiple LS swap vehicle applications using Hooker Blackheart engine mounting brackets/plates and transmission crossmembers
  • CAD modeled to provide optimal fitment and strength
  • Designed for use with multiple Hooker Blackheart engine swap transmission crossmembers
  • Provides powertrain inclination angles required to ensure compatibility with other Hooker Blackheart LS engine swap components
  • Designed for use with Anchor Industries™ 2268 (rubber) or Prothane™ 7-1604 (poly) transmission mounts
  • Includes attaching hardware

About Hooker BlackHeart

The BlackHeart team utilizes the latest technology and materials to design exhaust systems, engine swap kits, and mufflers for both import and domestic cars and trucks. Hooker Blackheart is platform-engineered to provide superb performance, aesthetics, and fitment.

Application94-98 Mustang LS Swap
Brand Hooker BlackHeart
Emission Code5
Product TypeTransmission Mount
TKO 500/600 Chevy
TKO 500/600 Ford
Transmission Type4L60-4L70 & TKO
Type of ComponentSpacer
Part Number71223012HKR

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.


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