Price: $59.95

Choose Quad & Stage Kit

TRX250EX - Stage 1 Kit TRX250EX - Stage 2 Kit TRX300EX - Stage 1 Kit TRX300EX - Stage 2 Kit TRX400EX - Stage 1 Kit TRX400EX - Stage 2 Kit 300FW FourTrax - Stage 1 Kit 350 4x4/2x4 Rancher - Stage 1 Kit 400FW Foreman - Stage 1 Kit 450FW E-S Forman - Stage 1 Kit TRX450R - Stage 1 Kit TRX450R - Stage 2 Kit

Stage 1 Kits - Intended for motorcycles with a stock engine using the stock airbox, air filter and stock pipe. Stage 1 kits are fully adjustable to allow the use of well designed aftermarket pipes and stock replacement air filters like K&N. Stage 1 kits are designed to improve throttle response and driveability and in most cases power increases of approximately 5% throughout the entire power range can be achieved.

Stage 2 Kits - Intended for motorcycles with a stock or mildly tuned engine using a well designed aftermarket pipe with a modified airbox and a stock replacement air filter. Stage 2 kits are designed for applications where individual filters cannot be installed and for applications where airbox modifications improves the engine's performance. In most cases power increases of approximately 8% can be achieved.

Stage 3 Kits - Intended for motorcycles with stock or mildly tuned engines using a well designed aftermarket pipe and individual air filters. In most cases power increases of 10-15% can be achieved. However driveability may be compromised particulary with short stroke, high rmp motors. On some modern engine and airbox designs, individual filters and proper jetting offer no performance improvement yet compromise driveability, in such cases stage 3 kits are not available.