Quote:
Originally Posted by bcredliner
Very pretty!
For clarification- The dyno runs were with open headers
The engine was tuned to optimize header performance gains
The headers are straightforward install on my X5
No other modifications were made to exhaust
Questions:
Why doesn't either TQ or HP fall off on dyno runs?
Why does TQ line fluctuate so much?
Is there a warranty?
Will there be a printed gain in HP and TQ one can expect on a stock 4.6?
How much is left for porting?
Do the collectors line up to the stock exhaust location?
Will there be a tune available to compliment the header performance?
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I was going to try and answer all these questions but I'd sound like a broken record if I said "I don't know" to each.
If I have time/money I'll install these on a stock 4.4 and then my wagon's 4.6 with nothing behind the headers but miles of pipe. No cats, no m5 resonator (I'm trying to figire a way to cut and weld two small mufflers together with a cut-out just before them but I might keep the resonator for now)
I will ask Jed though. He just now is moving his shop so I'm not sure how long the response will take. Good questions however.