Hey guys,
I had a question about the Magnaflow exhaust from RRM.
I know that our stock piping has a good flow to it & does not need to be changed, unless you are turboing etc. Well, I'm planning on it & why waste time & just get 2.5 SS piping... But would the Magnaflow exhaust fit, because that piping is 2.25...
If it won't fit do you guys have any suggestions on what to do for fitment, because I want to go with the Magnaflow exhaust.

Thanks!

 

what exactly are you asking? yes, rrm has a magnaflow axelback and catback bolt-ons. yes, they both fit. what's the deal with 2.5" piping you're talking about?

 

Sorry, if that isn't clear...
I was going to upgrade the mid-pipe from Cat to axle to 2.5...
Wondering if the RRM would fit with this since the pipe to the muffler is 2.25... It would seem not, but I don't know how hard it would be to make it compatible.

 

You would have to get a reducer pipe installed to make the drop from 2.5" to 2.25". But that's stupid for forced induction applications. You want the piping size to be consistent all the way through for turbo.

Just get some 2.5" pipe custom-bent from a good shop, and purchase an aftermarket muffler with a 2.5" inlet.

 

I forgot about Ultimate Racing. They have a 2.5" cat-back with a Magnaflow muffler. Just get that.

 

Yeah, I get that... I was just wondering, but Ultimate Racing uses Magnaflow as well?
I've looked at it but didn't see that they stated who made the muffler they use.
Thanks for the help!!!

 

yeah, I read it on here somewhere. I didn't know either for the longest time until someone actually posted on here and claimed it. No prob for the help, dude...anytime!

 

Maybe I should just start a new thread but I was wondering If there would be a perfomance difference between the RRM axleback and just having a local shop install the magnaflow?

 

Not really. Regardless of the size of the exhaust on the stock motor, an exhaust will do little to enhance the performance. This is why RRM decided strictly to release the axle-back. This is probably also why you don't see more vendors releasing cat-back exhausts, because they know it won't do much in the way of performance. In all honesty, the stock exhaust is very free-flowing, except for the somewhat baffled muffler.


So I guess in response to your question (), won't be much difference at all, unless you start going different size on a custom job. Even then, the only thing you'll notice is a change in sound.

 

I should probably add though that you will start noticing a difference in the exhaust performance once engine mods are added. (Air in = air out..). Once you start modding the engine, adding bigger downpipe, etc...then a bigger exhaust will yield bigger gains.

 

i dont think there would be any problem as long as u get the right mufler. but if you have the shop do 2.5" it will prob drop some of the gains (go from too restrictive to too big!). dunno if you planned on doing that or 2.25", but its in the context of this thread.

anyone know how much of a diff the 2.5" axleback would be from the 2.25" if the rest of the piping is left at 2.25"? you still get like 90% of your distance at 2.25. and since it has already been through the cat and the resonator, i dont think its a big deal.

i ask becase I want to go 2.5" after I can get a good turbo kit, but dont want to buy an axleback now that I am gonna have to replace in a few months.... but I dont want to get something now that I will make me lose power in the time being.

 

I think I'll save some money then and just have a shop around here install the muffler. No sence in spending more to get the same sound and performance. I'm also gonna do an intake probably before I do the muffler.

 

I got my exhaust done at a local muffler shop and it cost me $309. thats about how much just the muffler on Road Race would cost you to buy and ship it. I got hooked up

 

Yeah, it is really free-flowing... you can even feel the flow of it just sticking your hand behind the exhaust... it's got a really good flow, but since i DO have engine mods in mind that's why I was wondering...
So the question is if I am turboing in essence, if I get a bolt-on turbo kit (RRM) I do not actually have to change the cat-back and will still have the same gains from the kit?
I feel like that has been implied here.
Now that it was mentioned I could understand that going bigger may be a bad idea because it flows so well AS IS and going bigger could disrupt this flow.
What do you guys think?

 

The RRM turbo kit comes with it's own downpipe that eliminates the cat... it connects to the stock piping which is plenty big enough that is why i encourace people to just get the axle back and leave the rest alone. If your staying NA get the NA downpipe if your going turbo then wait as it comes with its own down pipe.