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Custom Racing Engine Builder

Select a base and choose components by section. Price & estimated HP update live.

Base Engine

Carburetion

Stock Carb (included) Tillotson 196 Performance Carb (+$75, +1 hp) Mikuni 22mm Flat Slide (+$120, +2 hp) 28mm PWK Racing Carb (+$185, +2 hp) 34mm Flat Slide Kit (+$320, +3 hp) EFI Conversion Kit (+$600, +3 hp)

Intake

High-Flow Intake (+$50, +1 hp)

Exhaust

Straight Pipe Header (+$60, +1 hp) Tuned Header (+$150, +2 hp)

Internals

Forged Piston (+$120) Billet Rod (+$100) Billet Flywheel (+$150)

Camshaft

Stock Cam (included) Mid-Range Torque Cam (+$60, +2 hp) Aggressive Race Cam (+$80, +3 hp) Ultra-Light Billet Cam (+$120, +4 hp)

Cylinder Head

Ported Head (+$250, +3 hp) CNC Race Head (+$400, +4 hp)

Valve Train

Upgraded Springs (Single) (+$35) Dual Valve Springs (+$80) Titanium Retainers (+$110, +1 hp)

Special

Ceramic-Coated Piston (+$60) Dyno Sheet (+$100)

Your Build

Total Price: $0

Estimated Horsepower: 0 hp (*estimate; actual horsepower may vary)

Selected Upgrades:

SPX Engineering — Hand-built, race-ready engines.

Horsepower is estimated; actual horsepower may vary. For racing use only.

Contact: spxengineering123@gmail.com • (555) 555-0123

Racing Use Waiver & Terms

For racing/off-road use only.
High-performance engines require expert installation/tuning.
No liability for damage, injury, or death from use or misuse.
Warranty void once sealed components are opened or unit is operated.
Horsepower figures are estimates; conditions/setup vary results.

I have read and agree to the waiver & terms above.