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Hey guys, so I have an 07 IS250 and I now, after numerous different setups, have a secondary cat delete, resonator delete, true dual to basically a HKS Hi Power muffler. The set up is very loud and i love the sound when i'm not gunning it, but as soon as I hit WOT it goes full rasp haha. I'll make sure to get some videos soon.
So... i'm looking to eliminate a lot of the rasp, and try to keep it as loud as possible.
I'm just looking for your guys suggestions, thoughts and opinions.
Some options I have thought of are:
1. Keeping it true dual and putting in two glass packs.
2. Having it Y-Pipe into a single inlet magna flow muffler with a built in x-pipe (in the muffler itself) and come out to dual piping back to the mufflers.
3. Having the same muffler as described above, but dual in dual out.
4. Having just an x-pipe built into the system.
You need to add a resonator back to the exhaust to help eliminate the rasp... Hopefully you can find one that works to eliminate the new noise frequency created with your redesigned exhaust.
yea you need a reaonator for sure, also do not x pipe.
im running invidia mid (has resonator but no secondary cats) to hks hi power and it sounds nice and deep kind of like an infiniti. even at wot not really raspy, the resonator does wonders
also, what is the piping size of your custom midpipe section, is it significantly different than the hks axleback? not sure if this matters but it just came to mind
yea you need a reaonator for sure, also do not x pipe.
im running invidia mid (has resonator but no secondary cats) to hks hi power and it sounds nice and deep kind of like an infiniti. even at wot not really raspy, the resonator does wonders
also, what is the piping size of your custom midpipe section, is it significantly different than the hks axleback? not sure if this matters but it just came to mind
Nah its all the same size.
So a resonator seems to be the way to go. But, does that mean I need to go back to 2 Y-Pipes. Or are there dual in dual out resonators? Couldn't i just put a dual in dual out muffler (straight through design) and it would act as a resonator?
So a resonator seems to be the way to go. But, does that mean I need to go back to 2 Y-Pipes. Or are there dual in dual out resonators? Couldn't i just put a dual in dual out muffler (straight through design) and it would act as a resonator?
not sure what you mean by "dual in dual out resonator", if you have a true dual exhaust you'll need 2 resonators, one for each piping on the midpipe portion of the exhaust. oem only has one res because it is not a true dual and only has one pipe in that area
not sure what you mean by "dual in dual out resonator", if you have a true dual exhaust you'll need 2 resonators, one for each piping on the midpipe portion of the exhaust. oem only has one res because it is not a true dual and only has one pipe in that area
hope this helps
Well my problem is there isn't enough room for two resonators in there so I was planning on doing something like this
oh i see. here is a joe z exhaust compared to an oem. the joe z has two small resonators and piping distance seems similar to your set up
ask your muffler guy if he thinks he can weld two resonators on like that. pretty sure it's possible, just need to find resonators small enough,, maybe he knows where to get some or he can order some
As my previous post states, bought two of the Wesdon 19" long, 3.5" diameter resonators... I got them installed this weekend and I'm more than happy. All of the rasp is gone, like, all of it, plus it is still as loud as it was before. It basically just refined the sound into a deeper, louder growl with no rasp. There is still a little bit of drone, but totally bearable (IMO).
didnt see the earlier replies in my email, and ya i would have not chosen magnaflow either. i never thought they had good quality and thought their systems which ive heard dont soind to good. glad you like it, maybe post a video
I have headers (longtube), and basically same exact set up as you with two resonators and still have rasp annoying rasp between 2500-3000 rpm how do I get rid of it? After and before those Rpm numbers it sounds *****in!!!
My muffler shop said an X-Pipe where the cats were would smooth out the sound and kill some of the rasp. The resonators killed it for me though. I feel once they break in it might become raspier and i might get the x-pipe done.
04-06-16, 11:00 PM
Best way to eliminate rasp?
