Banks Power 3.5" Boost Tube Upgrade | 20-26 Duramax L5P (26005)

Banks Power 3.5" Boost Tube Upgrade Kit - 2020-2026 Chevy/GMC 2500/3500 6.6L Duramax L5P (SKU: 26005)

Product Description

Unleash Your L5P’s True Potential with the Biggest Boost Tubes on the Market

Your factory 2.5-inch Duramax intercooler pipes are choking your engine. Built with crushed bends and flimsy, flex-prone rubber, stock pipes cause boost pressure loss, turbo lag, and rob your truck of its potential power.

The Banks Power Boost Tube Upgrade Kit (26005) changes the game. Measuring in at a massive 3.5 inches in diameter, these are the largest charge air cooler pipes available for the 2020-2026 Chevy and GMC 2500/3500 6.6L Duramax L5P. By replacing your restrictive factory components with smooth, mandrel-bent aluminized steel, you’ll see a massive 26% to 45% improvement in mass airflow.

The result? Your turbo spools up dramatically faster, throttle response becomes instantly crisp, and your engine works less hard to compress intake air, reducing overall engine stress.

Why Upgrade to Banks Power Boost Tubes?

Massive Airflow Gains While competitors max out at 3.0 inches, Banks goes all the way to a constant 3.5-inch diameter on both the hot and cold sides. The hot side flows 490 CFM (vs. 388 CFM stock) and the cold side flows a staggering 635 CFM (vs. 435 CFM stock).

Indestructible Build Quality GM’s factory cold-side design relies on a nearly full-rubber hose that swells under pressure and dries out over time. Banks replaces this with mandrel-bent aluminized steel that will never flex, crack, or deform under clamping force.

Precision Billet Couplers For the 2020+ L5P, Banks engineers used advanced CFD (Computational Fluid Dynamics) simulations to design a pair of custom billet aluminum cold-side adapters. Featuring a unique double-parabolic Venturi-like taper, these adapters flawlessly connect to your intercooler and throttle body to maintain boost pressure and prevent the breakage common with stock parts.

Heavy-Duty Connections Every kit includes proprietary 5-ply, heavy-duty Nomex woven silicone hoses and spring-loaded constant tension clamps to guarantee your boost stays where it belongs—in your engine, not leaking out of weak joints.

Key Features & Specifications

• Industry-Leading Size: Constant 3.5-inch diameter tubing (vs. 2.5-inch stock and 3.0-inch competitors).

• Proven Flow Increases: 26% more flow on the hot side, 45% more flow on the cold side.

• Quicker Spooling: Vastly reduces turbo lag and increases throttle response.

• Premium Materials: Smooth, mandrel-bent aluminized steel construction with a striking red powder-coat finish.

• Billet Venturi Couplers: Custom-machined adapters maximize airflow and eliminate stock breakage issues.

• Leak-Proof Hardware: Includes 5-ply Nomex silicone hoses and high-quality spring-loaded constant tension clamps.

• Temperature Ready: Pre-installed bung for an optional temperature probe.

• Emissions Compliant: 50-State Legal (CARB EO: D-161-171).

Vehicle Fitment

• 2020-2026 Chevrolet Silverado 2500HD & 3500HD (6.6L Duramax L5P)

• 2020-2026 GMC Sierra 2500HD & 3500HD (6.6L Duramax L5P) (Direct replacement for GM Part # 84914123)

** Some vehicles may need modification to the Hot side pipe due to the conversion of the vehicle

Stop leaving horsepower on the table. Upgrade your L5P Duramax with Banks Power Boost Tubes today for uncompromised airflow, immediate throttle response, and bulletproof reliability.