I was wanting to get the 3" magnaflows and didn't know what part number. Thanks!

 

I have had magnaflow hi flows on my offroad rigs 2 jeeps. Only thing I noticed was the tone changed. Couldnt really tell you if they improved performance because it took about 15 seconds to get up to 60 mph. Lol big tires will do that to ya on stock gears. I have always just gone to an exhaust shop and asked for them to be put on never got them online. Out here in oregon it was about 60.00 installed. Worth stopping by an exhaust shop to see how much they are if you got one close to you. I just got my silverado so I dont know the part number but somewhere down the road I will prob put some on if my OEM go out. Good luck.

 

I use the stock gutted ones

 

Do the magnaflow cats sound deeper, louder, etc.?

 

I'm running the cats that came with my StainlessWorks LT's and catted y-pipe...they seem to work best in this configuration:

 

I had a pair of the 3" magnaflow cats, couldnt really tell a change in sound.

 

My gas mileage sucks right now. About 4 years ago, I made 22rwhp/25rwtq with the cut-outs open, compared to full exhaust with stock cats, lapole mids (1 3/4") true duals (2 1/2") with x-pipe and dynomax bullets. I'm pretty sure they're holding me back a little bit. Really thinking about going with the tsp car long tubes with the 1 7/8" primaries, 3" dual set-up with magnaflow cats, x-pipe and a pair of small magnaflows. Should sound good and add hopefully about 15-20 at wheels!