Mishimoto Hot Side Pipe Boot Kit 17-19 GM 6.6L L5P Polished

Mishimoto Hot Side Pipe Boot Kit for 2017–2019 GM 6.6L L5P improves power and efficiency by addressing the factory hot-side restriction, delivering a more direct path for charged air and helping the turbo system work more effectively.

This kit replaces the stock hot-side intercooler plumbing. The stock component is a 2.5in pipe with tight bends and an integrated resonator that adds flow resistance; replacing this section reduces that restriction and supports more consistent boost delivery and throttle response.

• Factory 2.5in hot-side pipe — The undersized 2.5in diameter acts as a choke point; identifying this as the limiting component explains why replacing the pipe is necessary to reduce pressure drop.
• Tight bends in stock plumbing — Abrupt bends increase turbulence and pressure losses; a straighter, purpose-built path reduces those losses for smoother charged-air flow.
• Built-in resonator on factory pipe — The OEM resonator creates additional restriction in the hot-side path; removing or redesigning this element lowers backpressure and helps maintain turbo efficiency.
• Mishimoto engineering and validation — Mishimoto’s reputation for robust cooling and forced-induction components means the kit is developed with application-specific considerations for the L5P platform.

Key benefits

• Reduced hot-side restriction for improved turbo efficiency and more consistent boost
• Improved airflow path compared to the stock 2.5in pipe and tight-bend routing
• Design intent focused on reliability and real-world performance for the 6.6L Duramax L5P

Use cases and compatibility notes

• Intended for 2017–2019 Chevrolet and GMC vehicles equipped with the 6.6L Duramax L5P engine
• Suitable as part of a turbo upgrade or high-flow intake/intercooler system where reducing hot-side pressure drop is a priority

Materials and finish

Polished finish for corrosion resistance and ease of inspection. The kit is designed to integrate with the existing intercooler plumbing on L5P applications.

Installation

• Designed to replace the factory hot-side intercooler pipe and boots; professional or experienced DIY installation recommended to ensure secure clamps and leak-free joints.

Brand: Mishimoto