I'm doin a custom 2.5 exhaust on my 98 gs.....mods injen cai, header & DP, afx udp, plugs & wires(I guess a mod)also a performance muffler.....I've searched and looked at RRE for the mandrel bends but now I need to know exactly which bends I'll need and should I add a resonator if so how big??? I'm not sure but I think the inlet on the muffler is only 2.25 if so will this be a problem or will it not really matter??? Any insight would be great...thanks

if the inlet on the muffler is 2.25, then have the piping made in 2.25. Your exhaust is only as big as its smallest point.

Originally posted by silvereclipse30
I'm doin a custom 2.5 exhaust on my 98 gs.....mods injen cai, header & DP, afx udp, plugs & wires(I guess a mod)also a performance muffler.....I've searched and looked at RRE for the mandrel bends but now I need to know exactly which bends I'll need and should I add a resonator if so how big??? I'm not sure but I think the inlet on the muffler is only 2.25 if so will this be a problem or will it not really matter??? Any insight would be great...thanks

I got a ton of mandrel bend I didnt end up using when I did my custom intercooler piping. If you want to buy them they are 2.5"... the size you want. Email me at: bigpoppapump1173@hotmail.com or reply here.


"Who needs a 4G63? I'd rather walk the competition than my crank..."

- Bill Hahn.... 420a GOD :bowdown

...that, and you can also find them at ERT for like $16 a piece. They sell only the 180* bends, but you can cut them to anything in between as needed, so you can buy maybe 3 of them and have all the mandrel bend you need. Also, I would use 2.5"ID throughout, and then step it back down to meet the muffler inlet. Try to find a glass pack with the same diameter as your piping too. The length will be dependant on how much room you have in a straight line (so if you remove the cat, you could use a longer one). Not sure what kind of length is required vs. too much. :P It's what I'm doing here in a few weeks, so if this isn't a good idea, well, I've got some time to rethink it. :)

Originally posted by DR1665
...that, and you can also find them at ERT for like $16 a piece. They sell only the 180* bends, but you can cut them to anything in between as needed, so you can buy maybe 3 of them and have all the mandrel bend you need. Also, I would use 2.5"ID throughout, and then step it back down to meet the muffler inlet. Try to find a glass pack with the same diameter as your piping too. The length will be dependant on how much room you have in a straight line (so if you remove the cat, you could use a longer one). Not sure what kind of length is required vs. too much. :P It's what I'm doing here in a few weeks, so if this isn't a good idea, well, I've got some time to rethink it. :)

yeah...I was wanting to talk to u cuz I know u were planning on doin it but I never see u on AIM.....

Originally posted by DSMeclipseGS

Originally posted by silvereclipse30 I'm doin a custom 2.5 exhaust on my 98 gs.....mods injen cai, header & DP, afx udp, plugs & wires(I guess a mod)also a performance muffler.....I've searched and looked at RRE for the mandrel bends but now I need to know exactly which bends I'll need and should I add a resonator if so how big??? I'm not sure but I think the inlet on the muffler is only 2.25 if so will this be a problem or will it not really matter??? Any insight would be great...thanks

I got a ton of mandrel bend I didnt end up using when I did my custom intercooler piping. If you want to buy them they are 2.5"... the size you want. Email me at: bigpoppapump1173@hotmail.com or reply here. "Who needs a 4G63? I'd rather walk the competition than my crank..." - Bill Hahn.... 420a GOD :bowdown

umm....is that the same as the mandrel bent exhaust piping???

Originally posted by silvereclipse30
I'm not sure but I think the inlet on the muffler is only 2.25 if so will this be a problem or will it not really matter??? Any insight would be great...thanks

why would you go though all the time, trouble and money of fabing up a custom exhaust just to use the stock muffler? :nuts

Originally posted by micyek

Originally posted by silvereclipse30 I'm not sure but I think the inlet on the muffler is only 2.25 if so will this be a problem or will it not really matter??? Any insight would be great...thanks

why would you go though all the time, trouble and money of fabing up a custom exhaust just to use the stock muffler? :nuts

ummm....u need to re-read what I wrote but for u try to comment buddy!!!
:bash

oic...you said "performance muffler"...so your still going from a 2.5 exhaust to a 2.25 muffler...my :nuts still stands.

*edit*

and don't call me a but for

it won't matter that much.....it will help back pressure......or at least that sounds like a good answer....its a good muffler and I'm not buyin another one....:thumbsup