Deviant Race Parts

Deviant 73421 5/8" Transmission Cooler Repair Lines for 01-05 GM Duramax 6.6L

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  • Regular price $270.00
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Deviant Race Parts 5/8"  Transmission Repair lines for 01-05 GM 6.6L Duramax equipped Pickups with the Allison 1000 Transmission.

GM's factory transmission lines leave something to be desired. DRP saw a need to build a high quality, LIFETIME WARRANTED, part that completely replace the OEM lines. With thousands sold, we can say we've solved the problem.


  • 5/8" Industrial Strength Hydraulic Lines
  • All necessary fittings and adapters to bolt up to factory locations
  • Full, step by step, instructions
  • 2 out of 5 wrenches (1 wrench being easiest)