| Fully ported, flow bench designed, GX390 and GX420 Cylinder Heads available with swirl polish stainless racing valves and combustion chamber volume of your choice. $399.95 |
| 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. Piston kit includes forged piston, tool steel wrist pin, piston ring set and circlips. $225.00 Also available in 90mm Piston is 35% lighter than stock & wrist pin is 30% lighter than stock! |
| 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 |
| 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. $199.95 includes bearings and mil spec rod bolts rod bolt torque: 21 ft lbs. |
| 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 - $23.50 per valve. |
| New 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. |
| We took an existing 6" billet aluminum flywheel and re-tapered it to fit the GX390 crankshaft! Cooling fins included. $149.95 |
| Clements Racing Products 480-704-4087 |
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| GX390 Dual Valve Spring Kit $59.95 |
| "New, Clements 390 Outlaw Engine Kit" Everything you need from a 390 engine without all those parts you throw away. Introductory Price: $199.95 Also, we carry a full line of billet components to build these into complete Thunder Maker engines. **Note** This engine appears orange in the picture, it is actually a tomato red. |
Frequently asked question:
What does it have?
What does it have?
- Crankshaft
- Camshaft
- Valves
- Sideplate
- Cylinder Head
- Piston
- Flywheel
- Rod
- Carburetor/mounting
hardware - Gas Tank
- Muffler
- Rope Starter