[RESOLVED] Downpipe outlet size question

[chico904]

Hey guys, I have the Tsudo N1 3" catback exhaust that bolted right up to the stock cat. I want to buy a downpipe and on ebay they all have a 2.5 in inlet but vary in outlet sizes from 2.5 in 2.75 in and 3 in Just wanted to know which one will bolt right up to the catback. Thanks.

 

[No_Skillz]

If your Tsudo is 3", numbers suggest that 3in is perfect fit. However, the other sizes should bolt up also, since the bolt holes on the flange of your tsudo should be slots. Otherwise it would have a hard time fitting to your stock cat.

 

[Spln_Hrd]

I have the tsudo catback and the Megan 3in outlet downpipe, fits like a glove.

 

[chico904]

Did you feel any low end loss?

 

[fourreGsixty3]

On a stock cat guys? That was made for 2.25" exhaust, I would say upgrade to a 3" high-flow cat at the same time as you get the DP, my buddy had to pull his 3" straight pipe off for emissions and pit the stock cat back on and the thing was leaking cause of the size difference, and that stock cat will be a restiction and wont all for max HP to be gained from doing the DP, and cat-back exhaust.

Dustin

 

[No_Skillz]

Most of the downpipes sold on ebay (and the one I believe the OP is talking about) are cat eliminating. If you do want a high flow cat, you will have to go to a shop that does cutting and welding to hack a measured length of your downpipe and weld a a flange.

 

[chico904]

Yes, I was talking about the downpipe that deletes the cat. I bought the megan racing one with the 3 in outlet.

 

[fourreGsixty3]

Oh ok, then that makes sense .

Dustin