aFe 46-20704-B BladeRunner 3IN & 3-1/2IN Aluminum Hot & Cold Charge Pipe Kit Black

The aFe POWER BladeRunner 46-20704-B is a complete hot and cold aluminum charge pipe kit engineered as a direct replacement for the factory plastic intercooler tubes on the 2024–2025 GM Duramax L5P diesel. The OEM plastic charge pipes are prone to cracking and severely restrict airflow — this BladeRunner kit eliminates both problems with free-flowing, heat-resistant aluminum construction designed to maximize turbo-to-engine efficiency.

Flow & Performance:

• Hot side outflows the factory charge pipe by up to +26%
• Cold side outflows the factory charge pipe by up to +22%
• TIG-welded 3" hot side and 3-1/2" cold side aluminum pipes
• Mandrel-bent tubing with smooth transitions decreases turbulence and minimizes pressure loss for increased horsepower and torque
• Provides a smoother transition between the turbo and engine for lower operating temperatures and increased power

Premium Hardware Included:

• High-quality stainless-steel spring-loaded T-bolt clamps
• Heavy-duty 5-ply polyester reinforced silicone couplings
• Factory-style billet aluminum quick-connect adaptors with O-ring seals for a leak-free, durable fit
• 1/8" NPT ports provided for connecting boost sensors or water/methanol injection systems

Custom Appearance:

• Finished in wrinkle black powder coating for heat and corrosion resistance
• Unique laser-etched aFe POWER logo for a custom underhood look

The aFe BladeRunner 46-20704-B charge pipe kit is a direct bolt-on upgrade that replaces restrictive factory plastic tubing with free-flowing aluminum pipes, improving airflow efficiency, boosting turbo response, and helping support additional performance modifications on the 2024–2025 L5P Duramax platform.