Originally Posted by Gixxerboy63 (Post 810583)

OK, I'll bite. So... an x pipe will sound deeper, offer a more efficient exhaust... maybe slightly better torque and is inexpensive to accomplish? Sounds like a no brainer! ...but I have also noticed that no one has mentioned the effect on fuel consumption...

I put a flowmaster on my GMC Yukon and absolutely loved the improvement to the sound of the vehicle, but the fuel economy went into the toilet. Before I was getting 17-19mpg... after the flowmaster and K&N install it went to 12-15mpg.... no noticable power or torque increases, but sounded mean and not too obnoxious.... I'm wondering if the x-pipe conversion on my 4.6is would have the same effect?

:dunno:
...what's the real impact on fuel consumption (before vs. after an x-pipe)?

Originally Posted by ahvlanico (Post 815710)

Anothert question ?
is it dangerous to weld the exhauston the car (without removing it) it wont damage the electric components of the car ?
did you remove the battery ?
regards
nico

Originally Posted by ahvlanico (Post 815710)

Anothert question ?
is it dangerous to weld the exhauston the car (without removing it) it wont damage the electric components of the car ?
did you remove the battery ?
regards
nico

Originally Posted by Jordo (Post 815791)

Hahahahahahaha! Classic!

This complaint happens ALL THE TIME! You get an exhaust that sounds bitch'en... so naturly, you get on the gas more often so you can hear it. And your MPG goes right down the shitter. I have heard that complaint 1000 times, and this is 99.99% of the time the answer.

Watch your MPG gage on your X when you drive..... .5 inch more throttle.... under load... like going up a hill, and you roll it on, (like if you had exhaust this is where it would sound the meanest) your MPG is pegged at the bottom.... with just a smig more throttle.

If you put exhaust on, and its "better" (more HP or torque) your MPG got "better". hands down, no contest.