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Intake Gasket for Honda GX390 Big Block Clone Intake Gasket for Honda GX390 Big Block Clone

Intake gasket for Honda GX340, GX390 and big block clone engines.

Our Price: $1.95
Insulator Gasket for Honda GX390 Insulator Gasket for Honda GX390

Insulator gasket for Honda GX390 engines.

Our Price: $3.25
Cylinder Head Dowel for Honda GX390 Cylinder Head Dowel for Honda GX390

Cylinder head dowel fits Honda GX340, GX390, 420cc, 460cc big block clone engine.

Our Price: $4.00
Copper Exhaust Header Gasket for Honda GX390 Copper Exhaust Header Gasket for Honda GX390

Bullfrog Performance Products copper exhaust header gasket for Honda GX240, GX270, GX340, GX390, GX610, GX620 and GX690.  Will also fit Predator 420cc engines and many other big block clone engines.

Our Price: $5.00
Crankshaft Oil Seal for Honda GX390 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.

Our Price: $5.00
ARP Side Cover Bolt for Honda GX390, 460cc 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.

Your Price $5.45
Dipstick for Honda GX390, 460cc Big Block Dipstick for Honda GX390, 460cc Big Block

Dipstick fits Honda GX240, GX270, GX340, GX390, GX440 and 460cc big block engines.

Our Price: $6.00
Oil Fill Plug for Honda GX390, 460cc Big Block Oil Fill Plug for Honda GX390, 460cc Big Block

Oil fill plug fits Honda GX240, GX270, GX340, GX390, 440cc and 460cc big block engine.

Our Price: $6.00
Foam Air Pre-Filter 3.5" ID x 5" Length Foam Air Pre-Filter 3.5" ID x 5" Length

Foam pre-filter that fits our 500-1100 performance air filter.

Our Price: $6.58
Solid Side Cover Dowel Pin Kit for Honda GX390 (Includes 2 dowels) Solid Side Cover Dowel Pin Kit for Honda GX390 (Includes 2 dowels)

Solid side cover dowel pin fits Honda GX390 engines.  Order two per engine.

Our Price: $8.00
Foam Air Pre-Filter for Mikuni 38mm SBN Foam Air Pre-Filter for Mikuni 38mm SBN

Foam air pre-filter for our Mikuni 38mm Super BN air filter.

Our Price: $8.00
Insulator with Pulse Fitting for Honda GX390 Insulator with Pulse Fitting for Honda GX390

Insulator with pulse fitting for Honda GX390 engines.

Our Price: $8.95
ARP Head Bolt for Honda GX390, 460cc ARP Head Bolt for Honda GX390, 460cc

ARP head bolt fits Honda GX340, GX390, 460cc big block clone engines.  Order a total of 4 bolts for one engine.

Our Price: $9.95
Side Cover Gasket, 7 Bolt Side Cover Honda GX390, 420cc Big Block Side Cover Gasket, 7 Bolt Side Cover Honda GX390, 420cc Big Block

Honda GX390 side cover gasket.  Fits all 7 bolt GX390 engines and 7 bolt 420cc big block engines.

Our Price: $10.00
Air Pre-Filter Outerwears 3 1/2" ID Air Pre-Filter Outerwears 3 1/2" ID

Outerwears air pre-filter for our 500-1100 performance air filter.

Our Price: $11.95
Main Bearing for Honda GX390, 420cc, 460cc Main Bearing for Honda GX390, 420cc, 460cc

Main bearing for Honda GX340, GX390, 420cc and 460cc engines.   Requires two per engine.  (These are sold individually one bearing).

Our Price: $12.00
Head Gasket fits Honda GX390 .010" Thick Head Gasket fits Honda GX390 .010" Thick

This head gasket fits Honda GX390 88mm bore and is .010" thick.

Our Price: $12.95
Outerwears Air Pre-Filter for Mikuni 38mm SBN Outerwears Air Pre-Filter for Mikuni 38mm SBN

Outerwears air pre-filter for our Mikuni 38mm Super BN air filter.

Our Price: $14.00
Air Filter, Angled 4" Long x 2 7/16" ID Air Filter, Angled 4" Long x 2 7/16" ID

Small engine racing air filter for use in many applications including go karts, mini bikes and many other off road applications.

Our Price: $14.95
Head Gasket fits Honda GX390 88mm Bore, Graphite Head Gasket fits Honda GX390 88mm Bore, Graphite

This head gasket is a graphite head gasket and will fit the Honda GX390 engine with 88mm bore.

Our Price: $15.00
Electric Starter Block Off Plate for Honda GX390, GX440 Electric Starter Block Off Plate for Honda GX390, GX440

Electric starter block off plate fits Honda GX340, GX390, and 460cc big block clone engines.

Our Price: $15.00
Gasket Set, Honda GX390 Gasket Set, Honda GX390

Gasket set for Honda GX390 engines.

Our Price: $15.00
Head Gasket GX390 MLS 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.

Our Price: $15.00
Air Filter, 15 Degree Angled 6" Length x 2 7/16" ID Air Filter, 15 Degree Angled 6" Length x 2 7/16" ID

Performance air filter that fits Predator 212cc, Clone and Big Block applications with an air filter adapter with 2 7/16" diameter adapter.

Our Price: $15.98
Bronze Valve Guide Set, 6.5mm ID Sold as Pair Bronze Valve Guide Set, 6.5mm ID Sold as Pair

Bullfrog Performance Products bronze valve guide set will fit the Honda GX340, GX390 and many other big block clone engines with factory diameter valve stem size of 6.5mm.  Our bronze valve guide will outperform in longevity and performance over the factory steel guide.  Has closer to the same heat expansion rate as aluminum head for a more stabil valvetrain operation.  These are sold as a pair of bronze guides.

Our Price: $16.00
Air Filter, 10 Degree Angled 4" Length x 2 3/4" ID Air Filter, 10 Degree Angled 4" Length x 2 3/4" ID

Small engine racing air filter for use in many applications including go karts, mini bikes and many other off road applications.  Will fit our 38mm Super BN air filter adapter for the big block Honda GX390.

Our Price: $17.50
Starter Nut for Honda GX390 Starter Nut for Honda GX390

Starter nut for Honda GX340, GX390 and many other big block clones including 420cc Predator, 440cc and 460cc clones.  Uses 3/4" socket drive on end to start engine.

Our Price: $17.95
Copper Head Gasket, Honda GX390, 460cc, 500cc Big Block Copper Head Gasket, Honda GX390, 460cc, 500cc Big Block

Copper head gasket available in a variety of bore and thickness ranges for the big block Honda GX390, 460cc, 500cc engines.  Select the gasket below that fits your build:

Our Price: $18.00
Aftermarket Fuel Pump Round Walbro Style Aftermarket Fuel Pump Round Walbro Style

Aftermarket Walbro Round style fuel pump.  This is a pulse type fuel pump.  Has one inlet and one outlet.  Use this fuel pump on the Briggs & Stratton Animal, Predator 212cc, Clone 196cc and big block applications.

Our Price: $18.95
Magnetic Oil Drain Plug, 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.

Our Price: $19.00