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Phil are your stock manifolds leaking? If they were it would be an easy jump. Otherwise I'm not sure any performance benefit would stand alone enough to be worth the effort and expense. My prior experience with headers in general has been "why did I start this..."
.Ya us old guys
donthave greathorrible experience with header but we continued to run them. On the flip side I remember my collector days of 70SS BB Chevy and paying huge money for stock manifolds.
Im hoping the new generation with help from CNC, better materials, and input from the the old guys have stepped up. The research from the non VVTI DT SS looks positive.
If you can get 10% 25hp thats only $35 per HP - Sounds like a good male justification value
I have found over the years it does matter how much HP you have you will eventually find the bottom of the throttle and want more
I hear you on all counts Phil. You do know however that if you slap those on a stock single exhaust will seem, well, lame. Go big and dual it. The exhaust note alone will be worth every penny.....
The man in me agrees 100%. I have removed the rear resonator can and changed the waterheater of a muffler to something 1/2 it weight/size but because its our travel/tow car it needs to remain wife approved limiting some of the proper mods.