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The TDR Heat Shield was designed to help keep your under hood temperatures in check. It is manufactured using heavy-grade industrial aluminum to reflect radiant heat and to balance the conducted heat across its surface. Insulation is 2000 degree rated ceramic wool that helps maintain its shape as you form the TDR Heat Shield around the exhaust manifold or header. The outer surface is an aluminized fiberglass mat that not only looks good, but also adds to the efficiency by dissipating heat, resulting in lower surface temperatures.
Why the Heat Shield is a better option over header wrap: Cool air needs to be around the header, and insulating it with a wrap to hold exhaust heat in makes the header material surface temperatures reach near molten levels. When you wrap the header you trap the heat in the header, but also suffocate the material that needs to breathe to dissipate heat for its own survival. Most header manufacturers will NOT WARRANTY a header which has had a wrap installed on it. We also know that headers have been destroyed after running headers wraps, and these headers were on perfectly tuned engines. If you want a true thermal barrier that will reduce under hood temperatures without damaging your header or voiding its warranty, the TDR Insulated Heat Shield is the obvious choice instead of header wrap.
Works with factory manifolds and all aftermarket headers for all Miatas and MX-5s and is a must for supercharger applications. Creative customers have also used these insulated heat shields on everything from Honda Civics to V8 powered race cars.
Updated in 2013, this heat shield was improved with an additional layer of fiberglass mat and increased in size by about 20% so it works better with the Racing Beat header and the NC cars. Now 1 " wider and 3" longer in size.
Shown below on NA/NB Generation Miata but install looks about the same on the NC generation MX5 Miata.