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Old 06-23-2005, 02:01 PM   #1
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Default Some exhaust manifold info.

As most of you already know, the rear manifolds on a Bonneville are different then on Grand Prix etc. I knew that and made sure I got Bonneville manifolds. Well I picked up some ported manifolds off of a '99 Bonneville for my '03. Went to install them and went to bolt up the rear flange, turns out my rear flange and downpipe are larger then the '99'*. My guess is they changed the exhaust around when they chnaged the model in 2000. There'* no way to make it fit. I will use my stock rear manifold ( I'll polish it a little) and use the ported front one. It looks like it will fit ok. Just thought I would let you all know so you won't make the same mistake.
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Old 06-23-2005, 09:24 PM   #2
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Interesting.....
I got Togs won't be an issue for me
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