Can this fit our cars, or maybe certain years? Like the Series 1'*?

http://www.pfyc.com/store/merchant.m...ory_Code=GPEXH

That'll be a more complicated install on a Bonneville. We don't share the exhaust with the GP. Talk to Hector

Willwren is right. The exhaust is different between the GP and Bonneville. For that price you should be able to find a more generic aftermarket cat that will fit in replacement of the factory. It looks like the one in the pic also replaces the downpipe too.

Actually, I think you can do ok with the stock pipe and cat.

It'* possible sure with some cutting & welding though maybe. But I'm not sure on the performance gains (if Any)!

Umm..... I will be offering a high-flow cat/downpipe for Bonneville'* since I will be doing it on my car anyways.

But a quick note, I looked at someone'* 2000+ Bonneville in my neighborhood at 2am (I was running) and looked at the exhaust. It'* setup very similar to the GP'*, with a exhaust tunnel, reasonator and such.... So might fit on those. But will be making the Bonneville'* cat-back soon. I figured out what I want to do and keep the cost down to around $300.