i just got a complete engine and transmission swap done for my 95 dx. i plan to do a full exhaust from the stock headers back. What diameter piping would produce the most significant results. Also i plan on getting a random tech hi flow but im not sure which one to get cuz on http://sportcompactonly.com/product....8&c=100019&l=2 there are like 28 different types. Any input is appreciated. thanks

 

2.25...but 2.5 wouldnt hurt and would help if you plan on turboing or building the internals a lot.

 

2.25 -2.50 for NA. 3.00 with boost.

 

what is the difference between the cats, they have round metal matrix, round ceramic, and oval ceramic

 

what engine did you swap into your car? like another d-series,b-series, h-series?

 

Yeah, it all depends on how much exhaust gasses you are putting out. If you have the h22 than 2.5 wouldn't be bad. 2.5 on the b18 wouldl be slightly too big IMO, and 2.5" on the b16 is way overkill, plus you will lose some torque. IMO I would go with 2.25" unless you have an h22 or you are planning on boosting or doing othe internal work later on.

 

^^eh...idk abougt that...even on a 'stock' boosted D (meaning 6-8psi) 3" wont hurt. if you plan on turboing id go 2.5 now.

 

hey i swapped the JDM D15B in