Hi guys.
I just purchased a 05 C5 Allroad.. Auto..
One owner car all maintenance records and in great shape. 150k miles in Cali

The exhaust/ downpipe is blowing by it seems like .. So I was thinking to install bigger downpipe setup right away.

Has anybody had luck with the eBay downpipe set? Do they fit well?
https://rover.ebay.com/rover/0/0/0?m...2F151321577490

Further
I want to do a 402 mod and lower the car on 20 inch
How wide can I go in the front..
And what ET (15-25?? I heard)
Im looking at 20x10.5 et16. All Arround right now..
Planing 275 rears 245-255 front

Later on I want to upgrade with a Stage 1 tune

I'm in the bay area are there any other specialists/ tuners in this area besides 034?

I appreciate any tech help about fitment.

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