aFe 46-20339-B BladeRunner Cold-Side Intercooler Pipe for 17-19 Chevy/GMC 6.6L

Vehicle Fitment

• 2017-2019 Chevrolet Silverado 2500HD/3500HD (V8 6.6L L5P Turbo Diesel)
• 2017-2019 GMC Sierra 2500HD/3500HD (V8 6.6L L5P Turbo Diesel)

Features

• High-flow 3.5" mandrel-bent aluminum tubing for improved charge-air efficiency
• TIG-welded construction for maximum durability and strength
• Reinforced 5-ply silicone couplers designed to handle elevated boost pressures
• Stainless steel T-bolt clamps ensure a secure and leak-free connection
• Wrinkle-black powder-coat finish for enhanced corrosion resistance
• Includes 1/8" NPT port for boost sensors or water/methanol injection
• Optimized cold-side routing reduces restriction and lowers EGTs
• Direct bolt-on installation using factory mounting locations

Specifications

• Material: Mandrel-bent aluminum tubing
• Diameter: 3.5" high-flow design
• Finish: Wrinkle-black powder coat
• Port: 1/8" NPT auxiliary sensor/injection port
• Couplers: 5-ply reinforced silicone
• Clamps: Stainless steel T-bolt clamps
• Configuration: Cold-side intercooler/charge pipe
• Emissions: Not CARB-exempt for California emissions-controlled vehicles

Included Components

• 1x 3.5" cold-side aluminum intercooler pipe
• 2x Reinforced silicone couplers
• 2x Stainless steel T-bolt clamps
• 1x Billet quick-connect adapter with O-ring
• 1x Installation instruction set

Product Description

The aFe 46-20339-B BladeRunner cold-side intercooler pipe is engineered for improved airflow, durability, and performance on the 6.6L L5P Duramax engine found in 2017-2019 Chevrolet and GMC HD trucks. Its oversized 3.5" mandrel-bent aluminum construction minimizes charge-air restriction, helping reduce EGTs and increase throttle response under towing, hauling, or performance-focused driving.

This pipe includes heavy-duty 5-ply silicone couplers, stainless steel T-bolt clamps, and a billet quick-connect adapter for a precise, leak-free fit. The integrated 1/8" NPT port provides flexibility for boost monitoring or water/methanol injection setups. Installation is fully bolt-on and uses the factory mounting points without trimming or modification.

Ideal for Duramax owners seeking cooler charge air, improved reliability, and enhanced performance, this upgrade offers both strength and efficiency. Fitment is confirmed through 2019; coverage for 2020 and later models is unverified at this time.