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doug thorley headers
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  1. Exhaust Tech
    So I recently pulled the trigger and bought the Doug Thorley Tri-Y LTs. Correct me if I'm wrong, but after any headers install it seems like reattaching the O2 sensor is one of the toughest parts. I'm debating just buying the O2 extension harness from Marylandspeed...
  2. Exhaust Tech
    I am really liking the idea of the Doug Thorley LT's and am probably going this route when i do headers in the spring. After searching both forums there isn't really much feedback on these headers. I really want to see Dyno #'s and owners opinions after X amount of miles with them on your car...
  3. Exhaust Tech
    Today's improvements! Kook's 1 7/8" long tubes vs Doug Thorley 1 3/4" Tri-Y's: Kooks ports vs DT's, you can see on the DT's the soot ring showing how much smaller they were then the ports on my head! Pretty sure that wasn't helping power any! The Kook's mate up perfectly! Kook's 3" midpipe...
  4. Exhaust Tech
    I installed my new Doug Thorley Tri-Y Headers on Saturday. It took me the entire afternoon, but the overall install was pretty easy considering I had never done anything like this. The car feels like it picked up a ton of power and it sounds very mean now, almost angry. The headers bolt to the...
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