I want to put dual exhaust of my 90' Firebird, V-6, I want to use the 40 series

[mr.margarita]

flowmaster, can I? Most use the 80 series Flowmaster, but i was wondering if i could use the 40 series, better performance, and louder.

 

[stush30@verizon.net]

check with www.shopmufflers.com

 

[Goatman]

You could use either one but the 80 series has dual outlets like stock where the 40s have only one outlet, so it's unlikely you will see any benifit by using a 40 series ..