cat bolts & high flow cat

[cruzincivic]

Hey everyone,

I brought a thermal stealth catback from landspeedracing.com and it should be arriving in the next couple of days. I'm wondering what are the size and length of the bolts that are on the cat. Mine are pretty rusted and i will probably break them when i take the old catback off. I want to have the bolts before hand so i don't have to drive to the store while i'm trying to install the catback.

Another question is should i get a high flow cat or is it a waste? I plan on getting a header, but should i get the high flow cat too? I've read that it makes the thermal sound horrible but doesnt it depend on the company?