Crankshaft Oil Seal for Honda GX390
Crankshaft oil seal fits Honda GX340, GX390, 420cc and 460cc engines. Use this seal on both the PTO or Flywheel side. Engine requires two per engine so order a quantity of two per engine.
ARP Side Cover Bolt for Honda GX390, 460cc
ARP crankcase side cover bolt fits Honda GX340, GX390, 420cc, and 460cc big block clone engines. Order a total of 7 bolts for Honda GX340 and GX390. Order a total of 10 bolts for 460cc big block clone engines.
Head Gasket GX390 MLS
Multi Layer Steel head gasket that fits the Honda GX390 engine. Gasket has 89mm bore to fit the stock bore size on the Honda GX390.
Magnetic Oil Drain Plug, Honda GX390
Bullfrog Performance Products magnetic oil drain plug for Honda GX390 and big block clones. Billet aluminum drain plug includes the copper gasket. Our plug is a nice upgrade to catch any signs of engine trouble by catching the magnetic particles that may be in your engine oil.
Crankcase Cover Gasket and ARP Bolt Kit Honda GX340, GX390
Crankcase cover gasket and ARP side cover bolt fastener kit for the Honda GX340 and GX390 side cover. Changing out a cam or making internal repairs or just plain building a new engine from scratch then you will need our kit to get maximum seal and clamp load your side cover needs to hold the bottom end together.
Bullfrog Torq-N-Rev Big Block Billet Connecting Rod GX390 4.450" Length
Bullfrog Performance Products billet connecting rod fits Honda GX340, GX390, 420cc clone, 440cc clone and 460cc big block engines. Our Torq-N-Rev billet connecting rod is CNC machined from 7075 T-6 billet aluminum and includes babbit rod bearing set and ARP rod bolts and washers. This billet rod is 4.450" center to center length. Heavy duty rod cap and beam design for the most extreme engine setups. Fits stock piston pin or aftermarket pistons with the standard piston pin diameter.
Bullfrog Torq-N-Rev Billet Connecting Rod, Honda GX390 4.650" +.200" Longer Than Stock
Bullfrog Performance Products Torq-N-Rev billet connecting rod is manufactured from billet 7075 T-6 aluminum. Our billet connecting rod includes rod bearings and setup with ARP rod bolts. Our billet rod is +.200" longer than stock length of 4.650" center to center length. Works with our forged big block piston kits with .900" compression height.
Clutch, Bully Turbo 1" (less drive gear)
Bully Turbo 1" clutch for GX390, 460cc and V-Twin big block engines with 1" diameter output shaft. This clutch sku doesn't include the drive gear as they are sold separately on our website.
Billet Crankshaft, Big Block Honda GX390, +.200 Stroker
New from ARC Racing is a billet crankshaft for the big block clone 460cc or Honda GX390 engine. This billet crankshaft has +.200" more stroke than the Honda GX390 factory crankshaft. Crank stroke is 69mm. If using this crankshaft in the Honda GX390 block you will need to mill the top of your piston to achieve the correct deck height.