Eastwood Hi-Temp Internal Exhaust Coating

[The Spaceman_imp]

In theory it should help both with the blueing and provide better performance. Sort of like exhaust wrap done inside-out.

Possible downsides: reducing the inside diameter of the pipes reduces flow (probably negligible with a spray), and clogging the CAT and/or muffler if any peels off (this would be my #1 concern).

Prepping the pipes will be the key to success. I saw they have instructions on how to apply the product to used pipes; I'd follow them even with a brand new set to make sure you get the best possible adhesion.