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| GX390 and GX420 Clone, Big Block |
| 828-212-4664 |
| Fully ported, flow bench designed, GX390 and GX420 Cylinder Heads available with swirl polish stainless racing valves and combustion chamber volume of your choice. $350.00 |
| Forged Racing Pistons available for the Big Block Clone in Standard and +1mm bore sizes. Also available with Standard compression height and pin diameter, and also available in new raised pin version for our new "H"-beam long rod for the standard crankshaft. Piston kit includes forged piston, tool steel wrist pin, piston ring set and circlips. $225.00 Piston is 35% lighter than stock & wrist pin is 30% lighter than stock! |
| Forged piston shown here with available stock length billet rod and bearing insert for the GX390 Clone. Rod and Bearing are $149.95 |
| Forged racing piston for standard bore GX390 (88mm), downsized tool steel wrist pin to .630" diameter and raised to accomodate new longer billet rod. Notice valve reliefs pre-cut in piston in proper location. $225.00 |
| Competition exhaust systems, pipes and mufflers available for the Big Block Clones. $59.95 |
| Hard welded lobe race cams available for the Big Block Clones. This proprietary grind did not just fall off the turnip truck. Extensive dyno and on track testing has proven this to be the winning profile. $225.00 |
**NEW GX390 BILLET INTAKE MANIFOLD**
| This dual combo clearly shows the new longer billet rod (4.842) & raised wrist pin forged piston in comparison to cast aluminum units. Bolt-in horsepower and reliability. |
| H Beam Billet Rod Machined from Aircraft Quality 7075T6 Aluminum. 4.842. Torque to 21 ft lbs with oil on the thread. $175.00 includes bearings and mil spec rod bolts |
| Fits perfectly on your GX390 Clone Blower Housing. Solid screen for those wanting more heat in the engine $14.95. Vented Screens for those wanting to run a cooler engine. $19.95 |
| Steel billet starter nuts to fit the GX390 & big block Clones. Yellow zinc plated with 3/4" hex and 5/16" hex. $19.95 |
| Stainless Valves from Stock Clone to Huge Jr Dragster valves. Prices range from $16.00 - $22.50 per valve. |
| Machined billet aluminum flywheels with rare earth magnets for ignition strength, available in adjustable or non-adjustable styles. $199.95-254.95 |
| New Honda GX390 Billet Intake Manifold with hardware. Fits the Tillotson HR Series & the HW Avenger Series. $49.95 |
| These cylinder heads are built personally by Mike Clements. |