You can make anything fit...
The weight gain won't do your already tubby CRX any favours though.
The OEM double twin loop system will keep it quiet,
But twin tail pipe CRX's really are a thing of the past...
Like in "High Octane - Overboost"
No! No! Noooooooo! LOL

Weg...
Any talk of 15hp etc gains in S2K exhaust systems is pure B/S.
You're luck to see 4hp on an S2K with a cat back change.
If false advertising was illegal in practice,
They would be a few exhaust shops is some serious phoo for telling whoppers...
Re certain ads, certain magazines...
Claims of massive gains on the net are even more far fetched...