Dan SS

Hey GNN60GT500, what kind of Magnaflow system did you get?

I had a Magnaflow muffler on an IS300 I had before and really liked it. I have a 250 now and I'm considering doing something with the exhaust to open it up, but I don't want it loud.

Gernby

iTrader: (1)

I plan on keeping the stock mufflers, and just modify the stock mid-pipe. It shouldn't cost more than $200 if you can find someone willing to do it.

AM1

iTrader: (6)

but why would you modify the mid pipe then leave the stock mufflers on? im assuming your worried about noise right? You are helping the car "flow better" with the mid pipe switch but it would be restricted by the mufflers.

Gernby

iTrader: (1)

Considering that nobody is getting significant gains from replacing the stock mufflers, I believe that the stock mufflers aren't very restrictive. I suspect that the cats are the bottle neck, so I want to remove them first.

AM1

iTrader: (6)

oh you're talking about removing the cats? That should help but i think its illegal. i think random technology makes aftermarket high flow cats...but really how much gain were you expecting? You're definetly not going to get huge gains by modifying the exhaust like you would if the car was turbo or supercharged.

G35TOIS350

went with Tanabe and love it!

07Txlex

Hey gernby.. So you decided to go with the removal of the 2nd cats and silencer? That's cool, I will be right behind you if it sounds good. Also if your local to DFW and find a place to do it, tell them that you have another lined up if you think that would help

Gernby

iTrader: (1)

I'm thinking about doing it myself, or part of it. The local muffler shop said they would sell me the stuff to do what he won't do (remove the cats), then he would be willing to "fix" what I screwed up.

BTW, I am in McKinney.

07Txlex

Yea now I remember you saying that, well like I said I'm doing it to unless it sounds horrible, regardless of the gains if any.. Hope your ok with being the guinea pig lol, if you wouldn't mind letting me know of your results/progress that'd be awesome

Gernby

iTrader: (1)

I'll definitely post pics and a video when I do it.

ihkskim

i did that when i got my car a month in.. it was eh~ its not as loud as i thought it would be. think of it like tanabe exhaust just a little louder. droning goes away at 3k rpm. i rewelded it like 3 months later because i missed the "silence"

i don't know if any of you remember this.. i posted this last december 2005.

magnaflow w/ cut 2ndary cats. i paid $120. all they do is cut it and replace it w/ 2 pipes

combfilter

iTrader: (3)

I am right here with you guys too!!! Since the first set of cats are the only ones monitored by the ECU, we are ok to remove them. We will still pass tx state inspection and add some HP I am sure. I would like to do this mod and maybe even put some magnaflows on there like one other member has done. If you find a place in DFW that does this tell them that you not only have 07txlex behind you, but also 1 more member.

Gernby

iTrader: (1)

To clarify ... are you saying that JUST removing the secondary cats made the exhaust louder than the Tanabe exhaust?! ... and it had a drone?!

ihkskim

removing the 2ndary cats and getting custom piping done w/ the magnaflows did it. it's definately louder than tanabe.. not by that much though. I don't know how loud it would'ave been by just removing the 2ndary pipes. but it can't be that off.. magnaflows are consdered to be quiet

Gernby

iTrader: (1)

Magnaflows might be quiet by "performance aftermarket" standards, but I'm sure they caused the majority of the sound increase. FWIW, I removed my cat (the only one) on my S2000, and it only made a slight increase in sound with everything else stock.