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Originally Posted by Steve Tinker
Sam,
The company I used up here in Queensland is called HPC (High Performance Coatings) and I believe they have offices around Aus.
There are a couple of options available - silver which reduces heat by ~ 25% or black which reduces heat by an extra 3-4%.
You can get them coated internally or both internally and externally
My MX-5 engine bay was much cooler after coating new SS headers, even though I removed the factory heat shield. This made me decide to coat my MV Agusta motorcycle header and connection pipework which tends to run hot here in the sub-tropics. And after 4 years, the MX-5 headers looked as good as the day I put them on.
I had my MV's exhaust headers and connection pipe coated (both sides int & ext) last year for $220.
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+1 on coating over wrapping, HPC has been around for decades here in the USA assuming it is the same company. The P/S line does unbolt under the rocker panel. Very hard to unbolt at the pump due to access. Very hi-pressure hydraulic line so if you try to repair it make sure it's done properly. I have the same headers & I zip-tied the P/S line out of the way & ceramic coated the headers.