15" X 1.250" ID 3 Stage Straight Header for the Honda GX390.
15" Long X .990" ID 3 Stage Straight Header for the Honda GX390.
Stroker applications (-.050)Shorter compression height. Std bore 3.464 Clearance .0025 (@.850 down from oil land). Use stock GX390 UT1 T3 rings
Use enclosed wristpin (Can also use GX390 wristpin, but must be shortened)
Comes with Piston, Wristpin and 2...
Forged 420cc Diamond Piston 90mm (3.543) with valve reliefs. Clearance .0025 @ .850 down from oil land. Wrist pin 0.787" x 2.0"
Contents: Piston, Wrist pin and 2 Clips. Rings part number DJ-4290(see related items) sold separately.
Piston may require...
For Stroker applications (-.050") Bore: 90mm (3.543") Clearance .0025" (@.850 down from oil land)
Contents: Piston,Rings, Wristpin and Clips
GX390 small hole blower cover
GX390 Big hole blower cover
Cover for starter hole on Honda GX340/GX390 blocks for those not using an on-board starter.
Will work on Predator 420 and Vegas 460cc blocks
Honda GX390/420 billet sidecover. Machined from 6061-T6 aircraft grade aluminum features dual crank bearings and cam bearing for extra support. Uses all 4 dowel pens in the block for extra block support. A must for all modified and stroker applications...
30" .070 Buna-n O-Ring for our 6059 and 6060 Billet Sidecovers
Kit contains two .1mm shims and two .2mm shims
Billet dual bearing sidecover for the 460cc OHV engine. Features dual crank bearings to reduce crankshaft flex and ball bearing camshaft support. Uses all 4 dowel pins for extra block support. Comes complete with o-ring gasket, crank seal, crank shims,...