NickTheFox Posted July 8, 2013 Share Posted July 8, 2013 Hey im after some advice on replacing the muffler in my NA 4AGE MR2. The current original muffler has rusted out so im looking for a replacement that would be suitable but also sound good. Heres a picture of the current setup its a 2 inch system with one small muffler about 250mm long then into a 800mm long muffler which is the one im looking at replacing. I have had a look around and the best option I have found so far was this one here http://www.chase.co.nz/part/700/0/RD3812 which is $172. This is a 2.25 inlet outlet which I have read is the best size for a NA 4age so I would have to put in a reducer, but this would also allow for a future 2.25 upgrade. I just have a few questions as this is a truck muffler would it still sound descent? Also would it matter if used a standard shorter box muffler instead of a long cylinder one? Any advice would be muchly appreciated. Quote Link to comment Share on other sites More sharing options...
kpr Posted July 8, 2013 Share Posted July 8, 2013 i'd go bigger again, those muffler are likely to be quite restrictive. so going up a few sizes will make sure it flows as much as your 2" pipe Quote Link to comment Share on other sites More sharing options...
NickTheFox Posted July 8, 2013 Author Share Posted July 8, 2013 I was hoping you would see this KPR. Do you think this would flow better than the current muffler? I guess the flow depends on how many baffles in it? Also what sort of size would you go up to? Cheers Nick Quote Link to comment Share on other sites More sharing options...
kpr Posted July 9, 2013 Share Posted July 9, 2013 yeh hard to say unless you cut it up or put it on a flow bench. but you can pretty much guarantee, that anything other than a straight through design will flow worse than the inlet/outlet size. if you are going to run something like the one you linked. i'd run 2.5" in/out, with your existing 2" pipe. engine will not care if the muffler is way over sized. but it will if its undersized. that front muffler will likely just be a straight through reso. Quote Link to comment Share on other sites More sharing options...
Styles Posted July 11, 2013 Share Posted July 11, 2013 What about something like this, with a u-turn at the end, so it's looping back through itself?http://www.borla.com/products/proxs_dual_indual_out.htmlNot sure how hard one would be to get hold of though, the NZ distributor has pretty limited stock, and they're a bit spendy. I'm just a huge fanboi now I've got two on my MA61, they just sound so good. Quote Link to comment Share on other sites More sharing options...
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