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Cylinder Head Dowel for Honda GX390, GX440 Cylinder Head Dowel for Honda GX390, GX440

Cylinder head dowel fits Honda GX340, GX390, 420cc, GX440 and 460cc big block clone engine.

List Price: $2.01
Our Price: $1.75
Sale Price: $1.58
Savings: $0.43
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.

List Price: $2.24
Our Price: $1.95
Sale Price: $1.76
Savings: $0.48
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.

List Price: $3.39
Our Price: $2.95
Sale Price: $2.66
Savings: $0.73
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.

List Price: $3.74
Our Price: $3.25
Sale Price: $2.92
Savings: $0.82
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.

List Price: $3.74
Our Price: $3.25
Sale Price: $2.92
Savings: $0.82
Insulator Gasket for Honda GX390 Insulator Gasket for Honda GX390

Insulator gasket for Honda GX390 engines.

List Price: $3.74
Our Price: $3.25
Sale Price: $2.93
Savings: $0.81
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.

List Price: $3.74
Our Price: $3.25
Sale Price: $2.93
Savings: $0.81
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.

List Price: $3.74
Our Price: $3.25
Sale Price: $2.93
Savings: $0.81
Solid Side Cover Dowel Pin for Honda GX390 Solid Side Cover Dowel Pin for Honda GX390

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

List Price: $4.58
Our Price: $3.98
Sale Price: $3.58
Savings: $1.00
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.

List Price: $5.69
Our Price: $4.95
Sale Price: $4.46
Savings: $1.23
Crankshaft Oil Seal for Honda GX390 Crankshaft Oil Seal for Honda GX390

Crankshaft oil seal fits Honda GX390 engines.  Our crankshaft oil seal is made from Viton material to withstand higher operating temperatures.  Use this seal on both the PTO or Flywheel side of the engine.  Engine requires two per engine so order a quantity of two per engine.

List Price: $6.03
Our Price: $5.24
Sale Price: $4.72
Savings: $1.31
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, GX440 and 460cc big block clone engines.

List Price: $6.84
Our Price: $5.95
Sale Price: $5.36
Savings: $1.48
ARP Side Cover Bolt for Honda GX390, GX440 ARP Side Cover Bolt for Honda GX390, GX440

ARP crankcase side cover bolt fits Honda GX340, GX390, 420cc, GX440 and 460cc big block clone engines.  Order a total of 7 bolts for Honda GX340 and GX390.  Order a total of 10 bolts for GX440 and 460cc big block clone engines.

List Price: $7.98
Your Price $5.45
Savings: $2.53
ARP Head Bolt for Honda GX390, GX440 ARP Head Bolt for Honda GX390, GX440

ARP head bolt fits Honda GX340, GX390, GX440 and 460cc big block clone engines.  Order a total of 4 bolts for one engine.

List Price: $7.42
Our Price: $6.45
Sale Price: $5.81
Savings: $1.61
Insulator with Pulse Fitting for Honda GX390 Insulator with Pulse Fitting for Honda GX390

Insulator with pulse fitting for Honda GX390 engines.

List Price: $10.29
Our Price: $8.95
Sale Price: $8.06
Savings: $2.23
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.

List Price: $10.29
Our Price: $8.95
Sale Price: $8.06
Savings: $2.23
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.

List Price: $10.29
Our Price: $8.95
Sale Price: $8.06
Savings: $2.23
Header Flange, Honda GX390 Big Block Clone Header Flange, Honda GX390 Big Block Clone

Our exhaust header flange is 1/4" thick and CNC machined for the DIY person who needs to custom make an exhaust system.

List Price: $11.49
Our Price: $9.99
Sale Price: $8.99
Savings: $2.50
Header Flange for Honda GX390 Header Flange for Honda GX390

Bullfrog Performance Products header flange fits the Honda GX390 engines.  Great item for the DIY person who wants that custom header design.

List Price: $11.49
Our Price: $9.99
Sale Price: $8.99
Savings: $2.50
Valve Lock Kit for Bullfrog Billet Retainers Honda GX390 Big Block Valve Lock Kit for Bullfrog Billet Retainers Honda GX390 Big Block

Bullfrog Performance Products set of valve locks for one complete Honda GX390 engine that fits our billet aluminum Honda GX390 aftermarket valve spring retainers.

List Price: $13.43
Our Price: $11.68
Sale Price: $10.51
Savings: $2.92
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.

List Price: $13.74
Our Price: $11.95
Sale Price: $10.76
Savings: $2.98
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.

List Price: $13.74
Our Price: $11.95
Sale Price: $10.76
Savings: $2.98
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.

List Price: $14.40
Our Price: $12.52
Sale Price: $11.27
Savings: $3.13
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.

List Price: $14.89
Our Price: $12.95
Sale Price: $11.66
Savings: $3.23
Head Gasket Fits 420cc Big Block Engine, Graphite Head Gasket Fits 420cc Big Block Engine, Graphite

This head gasket will fit the Predator 420cc and many other 420cc big block clone engines.  It is a graphite constructed gasket that is .048" thick.

List Price: $14.89
Our Price: $12.95
Sale Price: $11.66
Savings: $3.23
Head Gasket GX390 MLS Head Gasket GX390 MLS

Multi Layer Steel head gasket that fits the Honda GX390 engine.  Gasket has 89mm bore.

List Price: $14.89
Our Price: $12.95
Sale Price: $11.66
Savings: $3.23
Klotz Nitro Power Additive Klotz Nitro Power Additive

Works with either gasoline or methanol fuels to increase horsepower and torque of modified engines.

List Price: $14.94
Our Price: $12.99
Sale Price: $11.69
Savings: $3.25
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
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.

List Price: $17.19
Our Price: $14.95
Sale Price: $13.46
Savings: $3.73
Gasket Set, Honda GX390 Gasket Set, Honda GX390

Gasket set for Honda GX390 engines.

List Price: $17.94
Our Price: $15.60
Sale Price: $14.04
Savings: $3.90