Boost Logic 4′ Downpipe Pair for Stock Turbos

Unlock maximum flow from your stock-style turbo setup with Boost Logic 4-Inch Downpipes for the Nissan GT-R. Designed for high-horsepower builds using stock-style manifolds, these downpipes significantly reduce exhaust restriction and offer substantial performance gains on setups producing 1,000+ WHP. Each downpipe terminates in a 4-inch V-band connection and pairs with our available link pipes for seamless integration with either the Boost Logic 4-inch or 4.5-inch exhaust system.