Exedy EFK227HP1 2001-On 4L65E/4L70E High Performance / Heavy Duty Clutch Module. 7 3-4 .065 Inch Waved Clutches. Stage-1

$ 92.00

Out of stock

SKU: EX EFK227HP1, RB STMGM17K Categories: , Tags: ,


Exedy Number EFK227HP1 2001-On 4L65E / 4L70E Stage-1 High Performance / Heavy Duty Clutch Module. Seven 3-4 .065 of an Inch thick Waved Clutches. Rated at 500 rear wheel horsepower. Exedy has improved their already durable clutch with 3-4 friction plates for the 700R4/4L60E family by incorporating micro-waves in the design. This design has undergone 22 months of extensive durability testing and is now available from PATC. Micro-wave technology is used in current vehicles to help fuel mileage by considerably reducing parasitic drag in unapplied clutch packs. Using this methodology, micro-waves applied to the 3-4 clutch dramatically reducing heat generated in 1st and 2nd gear by keeping the plates cooled and separated prior to applying. 

HP1= High Performance Stage-1 Factory thickness clutches with upgraded material.

The 700R4 / 4L60E family has long been haunted by premature 3-4 clutch burn-up; a decades-long problem where builders are seeking longevity. Over the years there have been various attempts to address this: from the changing the friction material and steel plate thicknesses, to the aftermarket trying extra thinner plates and single-sided plates but none of these addressed the root cause until now. 

Part number EFK173HP1 includes (6) .080” thick waved 3-4 clutch plates. (1987-Up 700R4 / 4L60E)
Part number EFK227HP1 includes (7) .065” thick waved 3-4 clutch plates. (2001-On 4L65E / 4L70E)

efk173hp1 efk227hp1 exedy 700r4 4l60e clutch modules

Raybestos 700R4, 4L60E, 4L65E Kolene Steel Module STMGM17K 1987-On.

Raybestos Powertrain Kolene steel clutch plates are high quality engineered high performance products. Kolene is a salt bath nitriding process. In generic terms, it is a thermochemical diffusion process, whereby ferrous parts are processed in molten salt with a specific nitrogen potential. In plain English, it provides a surface treatment that enhances wear and fatigue resistance from 200% to 500%. Kolene plates are higher heat resistant and offer increased lubricity. Kolene is a registered trademark of the Kolene Corporation.


  • Enhances wear resistance 200% to 500%
  • Enhances fatigue resistance 200% to 500%
  • Higher heat resistance
  • Increased lubricity
  • Surface treated
  • Engineered for high performance
  • Superior clutch durability

Additional information

Weight 15 lbs
Dimensions 16 × 16 × 4 in