Performance Exhaust System

[GOFAST GUY]

Originally Posted by weasel56

This is what I currently have done, which sounds good from inside the cabin, but has the previously described loping sound when you stand behind it.

I plan to replace the small resonators with an x-pipe, then possibly add QTP electric cutouts further back with turndowns for when I want it to be louder at the flip of a switch. (maybe tax return money...? )

QTP electric cutouts!!! WTF are those?? I'm going to have to research that. Sounds cool. Ok so, to raise another topic, what about replacing the bottle type resinaters on each side with pipe just after coming down from the headers before the O2 sensors, I'm guessing? Has anyone had any great success with cutting those out?

[Weasel]

Those are the catalytic converters, and the one member on this forum that had those removed accidentally by a shop not knowing what the "resonator" was didn't even make it home before the check engine light came on... Definitely leave those in!

But for the QTP electric cutouts, here's their website:

http://www.quicktimeperformance.com/QTEC/index.php

And a video of a car with them, closed at first, then open. (many more videos of them in action on there):

http://www.youtube.com/watch?v=42CGa...eature=related

[GOFAST GUY]

Is that ever F'n cool. I had never heard of that before. I'm totally looking into that today.

Thanks.

[mtX5]

Aren't the QTP electric cutouts pricey since alot of custom work must be done?

[Weasel]

The units cost about $150 - $170 each if I remember right, but other than welding in the split pipe for the cutout, the only other thing to do is run the wiring for the switch which wouldn't be all to bad in my book.

[GOFAST GUY]

I'd love to run piping out the side of my X5 just in front of my rear tires but I'm think'n my wife might pick up on that so where would you run the extra set up pipes?

[Weasel]

I'd likely just put turn down tips right at the cutouts... no extra pipes that way. Just gotta find the best place to put the cutouts w/actuators. Which from the looks of it are about the same size as a wiper or window motor total size.

[mtX5]

if you do go through with this, i'm definately interested to see/hear how it turned out.

[GOFAST GUY]

I've got a G-Tech Pro RR to test HP, Torque and all that. I'd want to do some test runs for sure before installing them. My boss had a number of original muscle cars back in the day and one of the cars had something like this but you had to get out and push them shut manually. He said the HP gain was noticeable on his big block Superbird.

[mtX5]

Originally Posted by GOFAST GUY

My boss had a number of original muscle cars back in the day and one of the cars had something like this but you had to get out and push them shut manually.

Thaaaank you technology