Muffler size sr20det 2.5 or 3" ? What fits in these

[cartel]

I put a 2.5 magnaflow in my pumpkin LZ 2.2 - oval 14" muffler
Its not that loud.. with dual SU's sounds a lot better than it did with the 2" that was on it .
fits well offset in and out.. used all mandrel bends and have 2.5" all the way to the header collector with v bands .
Solexes still to go on.. then should be louder but thats all intake

For the SR car is that large enough? i was having trouble finding a 3" offset /offset - mopac told me they only make a center /offset so i picked one up but it doesnt really fit right in a dime.

edit----
just found a 3" offset /offset magnaflow part # in 4 x 9" its #13239 and a 5 x 8 is # 14239 their website is so bad.. now to call tomorrow and see if anyone local has one-- im allowed to go to the usa for parts as im "commercial" if i cant get it local

the #13239 is a 3 chamber muffler and the #14239 is a straight through-- whats better for a turbo car?