RJSquirrel Posted December 8, 2011 Share Posted December 8, 2011 Header wrap on a daily-driven vehicle is a bad idea. Header wrap is intended for situations where maximum power(racing) is desired, at the expense of component life. Header wrap collects dirt and salt which become extremely corrosive at high temperatures. The photos of full-out race cars showing header wrap in sales brochures omit the inconvenient detail that those headers in the race cars are made from Inconel, and can tolerate temperatures far higher than any steels can. The ceramic coated headers do a good job of keeping the heat in the pipe, and a well-designed exhaust system will help reduce underhood temperatures by getting the hot gasses out of the exhaust system. If you have a localized hot spot, a heatshield made from a larger diameter pipe spaced and clamped over the exhaust pipe will provide an air break, and the refective barrier needed to keep the heat away from the floorpan. The spray can ceramic coatings don't last. The only product that works is to have the pieces shipped to Jet-Hot and have it done professionally, but that is big $$. BTW, stainless steel is a relatively poor conductor of heat, so stainless pieces tend to keep the heat in better than mild steel ones do. Link to comment Share on other sites More sharing options...
nismothunder Posted December 8, 2011 Share Posted December 8, 2011 Header wrap is worthless on trucks that see dirt use. What RJ said is true. If I remember there is a fiber glass backed steel mesh flexable heat shield that you can buy, which would work compaired too the hassle of cutting a larger section of pipe (or sheet metal) for a shield. I dont think high temp paint is a good idea for exhaust pipeing, claded peices tend too rust faster for me when painted. Link to comment Share on other sites More sharing options...
William Posted December 8, 2011 Author Share Posted December 8, 2011 Thx for the feedback guys. Enlightening as always What if in the future, I went ahead with my VG33E engine swap (which is quite tempting to be frank). Can I reuse these Doug Thorleys or I will need to get a new set of headers for the VG33E? William Link to comment Share on other sites More sharing options...
Tungsten Posted December 8, 2011 Share Posted December 8, 2011 You can use the same headers, you will just have to drill them out to 10mm because of the studs changeover. Link to comment Share on other sites More sharing options...
William Posted December 8, 2011 Author Share Posted December 8, 2011 You can use the same headers, you will just have to drill them out to 10mm because of the studs changeover. Nice. I feared this will be a show-stopper. On with it then Link to comment Share on other sites More sharing options...
MY1PATH Posted December 9, 2011 Share Posted December 9, 2011 Hit up MR 510 when you do your 3.3 swap. He makes a pulley hub that adapts the 3.3 crank to your 3.0 pulleys making everything a straight bolt-on swap. Link to comment Share on other sites More sharing options...
William Posted December 21, 2011 Author Share Posted December 21, 2011 After extensive online research, I narrowed down my options for the main Exhaust components as follows: A. I am replacing the stock Exhaust manifolds with ceramic-coated Headers from Doug Thorleys (2.5" Out) B. I am replacing the stock down pipe with a 2.5" pipe (12-14 gauge) connected via 1/2"-thick 3-bolt flanges B. I am replacing the stock Catalytic Converter with a FLOWMASTER 15150S 2.5" Universal Resonator ($108!): C. I am replacing the stock muffler with either one of the following options for a dual out on the same side (driver) I am leaning towards the Magnaflow (option#8) but could go as well for the Flowmaster (Option#6 or 7) to match the color of the Resonator. What do you think? William Link to comment Share on other sites More sharing options...
sewebster Posted December 21, 2011 Share Posted December 21, 2011 I'm pretty sure it's illegal to remove the cat in Toronto Link to comment Share on other sites More sharing options...
adamzan Posted December 22, 2011 Share Posted December 22, 2011 Yep in Ontario you can get a fine and if you are so unlucky to have the smog police pull you over, they will force you to take your truck off of the road. Link to comment Share on other sites More sharing options...
Nefarious Posted December 22, 2011 Share Posted December 22, 2011 Ya I believe the O2 sensor is 12mm x 1.5 thread. I know it's 12 mm. also any auto store should have exhaust flanges/gaskets/clamps/pipes/bends? have u TRIED going to the local automotive store yet? lol you could also just use slip joints that slide onto each other, then clamp down. just a little harder to get in and out that way... especially out, I find... Link to comment Share on other sites More sharing options...
Tungsten Posted December 22, 2011 Share Posted December 22, 2011 Get one of those mufflers and then weld a high flow 2.50" catalytic converter to the front of the muffler. All done. Link to comment Share on other sites More sharing options...
William Posted December 22, 2011 Author Share Posted December 22, 2011 Thx Guys for the replies. Do you think this is a good setup? - The Flowmaster Resonator in place of the CC (forget about the police in Toronto - I only drive my Path offroad these days ) - Which Muffler is best from the 8 options I listed? (mind you the IN and OUT of each) William Link to comment Share on other sites More sharing options...
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