GMC/Chevy, 2019-2026, 6.6L, Stainless - MPI Exhaust Cat-Back Dual Exhaust Kits

Welcome the best Chevy truck exhaust on the planet. The MPI Cat-back is the top choice for your 6.6L, offering the perfect CFM range to gain MPG while cruising or increased HP and torque when pulling. Paired with our MPI Pulse Chamber to keep all in-cab sound levels mellow and guarantee no drone. Put research, design, and 40 years of exhaust innovation under your vehicle. We offer a few options to fit your style. These kits are engineered for DIY installation, made in Montana, and backed by a lifetime warranty.

Features:

• Patented Pulse Chamber Technology: Our PCT eliminates all in-cab drones, even while towing! Backed by our Guaranteed No Drone.

• High-Quality Materials: The MPI Stainless kit features durable 409NI Stainless components, including hangers, clamps, tubing, and mufflers, with Stainless tips.

• Easy Installation: No welding needed. It uses factory hanger locations and includes detailed trimming instructions to accommodate all wheelbases.

Performance Benefits: ( Dyno Sheet ) 

• Horsepower Gains: +16 hp

• Torque Gains: +20.12 lb-ft

• Fuel Efficiency: Average improvement of 2-4 MPG

• Heat: Reduces under-hood manifold temperature by 150 degrees

Sound Quality:

• MPI Turbo Series: Our Turbo series Muffler combines MPI benefits with a pleasant, mellow exterior tone that is slightly deeper than the stock system.

• MPI Performance: Our Performance Muffler delivers a crisp, aggressive tone while staying balanced.

Fitment:

• Make: Chevy or GMC

• Model Years: 2019 – 2026

• Chassis: 2500, 3500

• Engine: 6.6L L8T (Gas )

• Wheelbase: Compatible with all wheelbases

Detailed Specifications

• Material: 409NI Stainless

• Installation: Clamp-together system, direct fitment to factory hanger locations.

• Hardware: Includes all necessary installation hardware.

• Design: Compatible with the factory spare tire.

• Tubing Size: Dyno-proven optimal size for performance.

• Tips: Large 3.5" x 12" long tips for a refined appearance.

Patented Technology

• Exhaust Pulse Chamber (Pat. 11713700): Guaranteed no drone and optimizes exhaust flow and overall performance.

Warranty

• Stainless Warranty: Limited Lifetime warranty on all components

Instructions

G451 & G452 - Instructions