HARD PARTS KIT This is the ultimate diy kit to strengthen your 8HP transmissionPURE HARD PARTS KITs (HPK) are available for all zf transmissions and a variety of transfer cases CLICK HERE TO INQUIRE & ORDER ALL KITS ARE IN STOCK AND READY TO SHIP!! Hard Parts Kit All 8HP45 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP50 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP51 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP55 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP60 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP65 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP70 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP75 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP76 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP90 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP95 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 8HP100 Hard Parts Kit from $3,499.99 Select Stage Stage 1 Stage 2 Add To Cart 13-1 Transfer Case - Hard Parts Kit $1,799.99 Add To Cart 35L Transfer Case - Hard Parts Kit $1,799.99 Add To Cart 45L Transfer Case - Hard Parts Kit $1,799.99 Add To Cart Jeep Trackhawk Transfer Case - Hard Parts Kit $1,799.99 Add To Cart Dodge TRX Transfer Case - Hard Parts Kit $1,799.99 Add To Cart