GSI exhaust

[mikec123]

Can anyone tell me the bore size of a standard gsi exhaust?:)

[Mike]

1.75inch IIRC?

[mikec123]

I need to change my backbox but my system is 2" bore! Do you know where i can get a 2" bore backbox of the shelf?

[Mike]

I need to change my backbox but my system is 2" bore! Do you know where i can get a 2" bore backbox of the shelf?

Ashely competition Exhausts :thumb:

[mikec123]

I'm on there website it says fits standard gsi exhaust but doesn't give a size! The 2" is the outside size!