i own an 88 dx hatch i've noticed some of the cat back exhaust i look at says dx and others say si, i am new to this and don't know much but wouldn't the it fit on either one? also anyone know anything about airmass? i was looking at the airmass warlock system . thanks!

 

Yea the DX and SI exhaust is the same. Airmass is a pretty good system, i have never used it, just been told it is.

 

yup they all fit. The only odd one out is the hf I belive.