Dynojet Q615 Jet Kit for Arctic Cat 400 4X4 02: Automotive. Buy Dynojet Q615 Jet Kit for Arctic Cat 400 4X4 02: Jets & Jet Kits - ✓ FREE DELIVERY possible on eligible purchases. Fits 02 Arctic Cat 400 4X4 . Stage 1 . Stage 1 kit are intended for motorcycles with a stock engine using the stock airbox, air filter and stock pipe . carburetor jet kit can provide you with a simple and affordable solution to all your carburetion problems. kits increase power and smoothness throughout the entire rev range, while maintaining optimum fuel economy. stage kits are fully adjustable to allow the use of a well designed aftermarket pipes and stock replacement air filters, stage kits are designed to improve throttle response and driveability and in most cases power increases of approximately percent throughout the entire power range can be achieved. stage kits are designed for applications where individual filters cannot be installed and for applications where airbox modification improves the engine's performance, in most cases power increases of approximately 8 percent can be achieved. Each jet kit includes comprehensive instructions which show step-by-step installation and testing procedures to ensure a perfect setup every time. This is backed by free telephone and Internet support to customers. . . .