5″ Monster Exhaust for 2020-23 Duramax
Unleash hidden power and protect your trailer! Banks’ Monster Exhaust upgrades your 2020-2023 GM 6.6L Duramax L5P with a massive 5″ DPF-back system. Boost horsepower and fuel economy with 85% less backpressure, and safeguard your trailer from scorching exhaust temperatures. Upgrade now!