down pipe install

Need advice on installing 3" down pipe on my 95 Riv. L67.....best product,mods i may need first etc..As of now i have only installed a FWI ......also need to find an STS strut tower brace...

You dont NEED any supporting mods to install a 3" downpipe, but it wont really improve power without other mods like higher ratio rocker arms or dropping supercharger pulley sizes.

There is no bolt up downpipe available for the 95 riv. I made mine out of a U-shaped piece of stainless and a straight piece of stainless cut and welded to the shape of the piece I cut out of the factory exhaust.

Thanks Dave..

th3fr4nchi5e wrote:

There is no bolt up downpipe available for the 95 riv. I made mine out of a U-shaped piece of stainless and a straight piece of stainless cut and welded to the shape of the piece I cut out of the factory exhaust.

Have any headers been confirmed to fit the S1? It looks like the exhaust manifolds are interchangeable........

I was under the impression that they were different just from never hearing of someone trying to swap them but I havent the slightest clue

Series one has siamesed runners. So its exhaust goes: 0-00 instead of 0-0-0 like the series 2. Then even if you cut one runner on a series 2 set of headers and modified, welding onto S1 flanges, the whole angle at the head is different due to the S1 having a 1" taller deck. Soooo, not remotely a nice swap. Though I'm sure anything is possible with enough drive...