The factory turbo inlet mouthpiece not only lacks style - it also restricts airflow and limits your engine's power potential. The HSP Max Flow Mouthpiece solves both issues using a cast-aluminum, CNC-machined design engineered for durability, airflow, and improved sealing.

Featuring an integrated O-ring flange to prevent unfiltered air leaks and a 1/2 inch NPT port in the PCV location, this mouthpiece ensures that your aftermarket intake system is not held back by a restrictive OEM component. The 4.5 inch inlet guarantees maximum flow before reducing to your 4 inch aftermarket intake.

Included Components:

• Max Flow Intake Mouthpiece For 04.5-10 Chevrolet And GMC LLY/LBZ/LMM Duramax With 4 Inch Aftermarket Intakes Flag Red
• 1x 4.5 inch Max Flow Mouthpiece
• 1x 1/2 inch NPT Plug
• 1x 4.5 inch to 4 inch Reducer Boot (for 4 inch aftermarket intakes)
• 1x 4.5 inch Stainless Steel T-Bolt Clamp
• 1x 4 inch Stainless Steel T-Bolt Clamp
• 1x O-Ring Seal

Vehicle Fitment:

• LLY: 2004.5-2005 (VIN Code 2) with 4 inch LBZ-style aftermarket intake
• LBZ: 2006-2007 (VIN Code 2 or D) with 4 inch aftermarket intake
• LMM: 2007.5-2010 (VIN Code 6) with 4 inch aftermarket intake

Special Fitment Notes:

• This mouthpiece will not fit with factory air intake systems.
• For HSP Intakes, please see 003-HSP.

How to Identify VIN Code:

• The engine code is determined by the 8th character of the VIN number.
• The model year is identified by the 10th character.

HSP No BS Limited Lifetime Warranty
At HSP, we believe in our products and stand firmly behind every one that leaves our facility. For years, we've gone above and beyond for our customers - even without a formal policy. With the HSP No BS inch Limited Lifetime Warranty, that same commitment is now set in stone, providing clarity, dependability, and support throughout ownership.