Wehrli WCF100732 T4 Turbo Housing Heat Blanket 2500+ DegF S300/S400/S500 Universal

Vehicle Fitment

• Universal - Fits all T4 flange style turbocharger exhaust housings. Compatible with Borg Warner S300, S400, and S500 series, Garrett GT50 and GT55, Holset, Precision T6, and other T4 flange turbos of similar housing dimensions. Not vehicle-specific - fitment is determined by turbocharger housing flange style, not vehicle make or model.

Fitment Notes

• This blanket is designed for T4 flange style exhaust turbine housings only. Verify that your turbocharger uses a T4 exhaust housing before purchase. T3, T6, and other housing styles are not compatible with this specific blanket.
• Compatible with a wide range of popular aftermarket turbocharger brands and series including Borg Warner S300, S400, and S500, Garrett GT50 and GT55, Holset, and Precision Turbo T6 housings with T4 flanges.
• Ideal for single, compound (twin), and triple turbo setups on diesel and gas performance applications including Duramax and Cummins platforms.
• No special tools required for installation.

Features

• Internally rated to withstand 2500°F+ direct heat - handles the extreme thermal load of T4 turbine housings in high-boost, high-EGT performance and competition applications
• Retains heat within the turbine housing to improve turbo spool response and maintain consistent exhaust gas energy at the turbine wheel
• Significantly reduces radiant and convective heat transfer from the turbo housing to the surrounding engine bay - lowers underhood ambient temperatures to protect nearby hoses, wiring, painted surfaces, and other heat-sensitive components
• Durable high-temperature exterior shell material resists degradation from sustained heat, oil, and coolant exposure
• Stainless steel rivet fasteners provide secure, permanent attachment to the turbo housing without corrosion risk
• Handmade construction with quality materials for consistent fitment and long-term durability under competition-level thermal loads
• Clean, professional appearance adds a finished look to aftermarket turbo installations
• Made in the USA by Wehrli Custom Fabrication (WCFab) in DeKalb, Illinois

Specifications

• Part Number: WCF100732
• Brand: Wehrli Custom Fabrication (WCFab)
• Application: T4 Flange Turbocharger Exhaust Housing
• Direct Heat Rating: 2500°F+
• Exterior Shell: High-temperature resistant material
• Fasteners: Stainless steel rivets
• Compatible Turbos: Borg Warner S300, S400, S500; Garrett GT50, GT55; Holset; Precision Turbo T6 (T4 flange) and other T4 flange housings
• Weight: 3.0 lbs
• Package Dimensions: 8 in. x 8 in. x 8 in.
• Construction: Handmade
• Fitment Type: Universal (T4 flange turbo housings)
• Country of Origin: USA (DeKalb, Illinois)

Included Components

• 1x WCF100732 T4 Turbo Housing Heat Blanket (stainless steel riveted, fully assembled)

Product Description

The Wehrli Custom Fabrication WCF100732 is a handmade T4 turbo housing heat blanket designed to fit any T4 flange style exhaust turbine housing, including the Borg Warner S300, S400, and S500 series, Garrett GT50 and GT55, Holset, and Precision Turbo T6 units. Rated to withstand 2500°F+ of direct heat, this blanket serves two equally important functions: it retains thermal energy within the turbine housing to maintain exhaust gas density and improve turbo spool response, and it dramatically reduces radiant heat transfer from the housing into the surrounding engine bay. The result is a measurably cooler underhood environment that extends the service life of hoses, wiring harnesses, painted components, and other heat-sensitive parts located in close proximity to the turbocharger.

The WCF100732 is built for the real-world demands of high-performance diesel and gas turbocharged applications - whether used on a compound Duramax build running an S400 outer turbo, a single-turbo Cummins setup, or any other performance application centered around a T4 flange turbocharger. The high-temperature exterior shell and stainless steel rivet fasteners provide secure, corrosion-resistant attachment directly to the housing, with no special tools required for installation. Construction is fully handmade at WCFab's DeKalb, Illinois facility, with the same attention to material quality and build consistency that defines the WCFab product line.

This blanket fits T4 flange turbocharger exhaust housings only - verify your turbocharger uses a T4 housing before ordering. WCFab also offers T6 housing blankets (sold separately) for larger turbo applications. Universal fitment - not vehicle-specific. Made in the USA.