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Heat/Sound Insulator Firewall

In stock
As low as $299.99
Have Questions? 714-985-4825

Diesel engines produce a lot of heat, especially in high-output situations like towing, racing, and light-to-light driving. Time to upgrade your tattered, dirty firewall insulation with the brand new PPE Insulator Firewall.

Create a barrier between you and the heat on your 2001-2007 Duramax diesel engine with this custom-fit replacement. This functional upgrade features merrowed stainless steel wire edging for long-lasting performance and grommets for an OEM fit. The ceramic fiber interior is sandwiched between the tightly woven silicone fiberglass outer fabric and the woven silica inner panel. The combination of materials and workmanship create a temperature resistance up to 1,290 degrees.


GM Equivalent P/Ns: 15940303, 115078177, 15998600


1999-2006 Sierra/Silverado – 1500/2500/3500

2000-2006 Suburban, Tahoe, Yukon

2001-2006 and Sierra/Silverado with GM 6.6L Duramax

2007 Sierra/Silverado Classic 1500/2500/3500 – GM Gas and GM 6.6L Duramax


  • Tightly woven silicone fiberglass and silica outer fabrics
  • Ceramic fiber interior.
  • Merrowed stainless steel wire edging
  • Reduced engine heat and noise entering the cab
  • Can be installed without removing engine


More Information
Weight (lbs) 3.0000
Full Dimensions (LxWxH) 8" x 8" x 15"
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⚠WARNING: Cancer and Reproductive Harm -