The exhaust system on the Duramax LB7 is one of the most restrictive parts with respect to performance. If you are looking to increase power, especially if you are tuned, an exhaust is one of the best LB7 upgrades. With power gains ranging from 20-30+whp and 40-60+wtq an upgraded exhaust will provide big power gains,... The post 6.6L Duramax LB7 Exhaust Upgrade Guide appeared first on Chevrolet and GMC Truck Information: Silervado, Sierra, and Colorado.
