I want to install exhaust cutouts what are your experience with them. I would like to know what size pipe is right up against the headers on our trucks, what do I do about the o2 sensors, will this destroy my valves and lastly what to do about the truck going lean?

 

Great...get 'em.

I have 2 1/4" at the collectors and 1 3" after the Y, but before the muffler. No problems with burned valves and my mixtture is good.

videowith sound

See my site for pix:

 

Mine are 2.5" and are in front of my X-pipe. I love them and gained about 4 rwhp when open. <img src="http://home.swbell.net/greghud/cutout.jpg" alt=" - " />

 

Go to my webpage and there is a video clip of me running through an open cutout, and through a PV muffler. The links are at the bottom of the page.

http://ktc000270.tripod.com

 

What about the o2 sensors, and why one further back do you open them all?