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How about a before and after dyno? Easy, simple, cheap. 1 7/8" 4-into-1 run 1, then tri-y, run 2. IF these are soooooo great, I think two dyno runs would be a no-brainer.
1 7/8" Headers cost anywhere from $300.00 to $1,500.00 (or more). I can't see any appreciable differences in them. Thats why I bought $295.00 Speed-Engineering. They look good, fit good, haven't cracked, loosened, or fell off! Really like them.
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13.244 @ 104.91 100% stock (#17).
Now - Mike Norris catch can. 245/50/19 Firestone Wingfoot A/S on LT2 black powder coated rims (square). 1 7/8" Speed-Engineering LTH, off road pipes, tune.
Now 12.93 @ 109.13.
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