Precision tapered billet sleeve directly replaces restrictive mesh element in intake manifold

Riva testing has determined the stock ECU will compensate for increased air flow

Provides low end punch and mid range pull

Enables Yamaha 1.8 Liter naturally aspirated engine to produce more horsepower by delivering increased air flow

REQUIRES Coast Guard approved aftermarket filter kit to meet flame arrestor requirements

Quick and easy installation

These items are designed exclusively for closed course competition use ONLY. Use on public lands and/or waterways in the state of California is illegal