Originally Posted by HeyYou

You need your pre-cat O2 sensor BEFORE the cat..... otherwise, you will get some REALLY odd running problems.......

Originally Posted by kajo

I just came in from the garage and got the cat installed. My y pipe came apart in 3 pieces so it definitely needed replaced. The only fitment concern was putting the 02 sensor in the front bung. It looked like it was going to hit the transmission pan so I put it in the rear bung behind the cat. After everything was all bolted up it looks like it would have cleared. Oh yeah, no donuts required so I retract that statement from last night.

I clamped it to the old 2.5" exhaust that was on the truck for now but know that needs replaced in the future. I Took it for a little spin and besides being much quieter the hill coming up to my house seemed to be easier than when I came home earlier in the day. I am towing my 4Runner about 160 miles this weekend so I will be able to see the difference over 3 weeks ago on the same route carrying the same load.

Magnaflow is not marked anywhere on it . I did save about $80 from buying it through Discount Performance Exhaust compared to the local Autozone when you include the state tax.

Originally Posted by tweav88

It made it quieter? well i wouldn't have expected that, do you have a stock muffler? and well that's good it helped with the power. I just took the manifold bolts out tonight and sprayed the hell outta the 02 sensor with some penetrating oil, cuz that thing is tight as hell. I should have it done tommorrow

Originally Posted by kajo

My Y pipe was broken before the Catalytic converter. Basically I had 2 strait pipes, 1 about 12" long and the other about 3 foot long. It has a nice tone to it and is louder than stock for sure.