I have a g35 sedan 6mt '05. I need tires and I would like to know if 245/45/18s will fit without any fit problems. I also want to put a coupe midpipe and wanted to know if anybody has installed one but the catch is has anybody removed the resonator and replaced it with a straight pipe. Thanks guys

 

If you are going to take the resonator off and put in a straight pipe you could likely come out cheaper if you just have a muffler shop put in a straight pipe for you without buying the midpipe.

As for the tire size, yes it would fit but you are better off to stay within 1%-2% of the stock diameter in order to not mess with the VDC and speedo too much. You would do better with a 245/40's.

Hope those help.

 

coupe mid-pipe on the '05's is pointless.....you'd be wasting your $$

 

The 245/45/18 is the correct size. My 05 sedan came with 235/45/18 at a O.D. size of 26.5 (Bridgestone Turanza ER33). The 245/45/18 Toyo Proxes T1-S has and O.D. of 26.7. The 245/40/18 has an O.D. of 25.7. Which one is closer, I'm thinking the 245/45/18 is the way to go here (.2 or .8). Much closer to OEM so it won't screw up your electronic aids, VDC and so on.

Be sure to look at the tire specifications online prior to purchase. Look at the Outside Diameter (O.D.) indicator. My 245/45/18 are great and I would not recommend the 245/40/18 based upon the math.

 

Someone posted a sound clip of a coupe a long time ago on freshalloy with a before and after it was straight piped. IMO it sounded horrible with the straight pipe.

 

Wouldn't it sound way different than a sedan though (as he does own a sedan and not a coupe)...... I'd think it would drone a LOT IMO.

 

BUHTSER - Here's a recent link re: coupe middy on '05 sedans: https://g35driver.com/forums/g35-sedan-v35-2003-06/84491-facts-about-coupe-midpipe-05-6mt-sedan.html

 

JIMMY thank you for that link it cleared up a lot for me. Now if I can find a good link on brakes...

 

Brakes? What's wrong w/ yours? I'm going to be replacing my OEM's w/ Hawk HPS pads, as they emit WAY less brake dust than my '04 OEM pads...but I know from my past PM's to you that w/ your '05, you don't have that problem. From what I've read here on the forum, Hawk HPS & Metal Matrix are the best. I have a good contact for cheap prices on Hawk pads if you're intrested...lemme know.

 

I just got 4 new tires installed. 245/45/18. They are General Tire model Acclaim UHP M+S. I picked them up from a sears in VA. So far so good. I don't have any problems yet. (warning lights or any abs issues.) Everything is running smoothly and they look great also. The thing that I want to clarify about the midpipe is : Has anybody removed from the coupe midpipe the resonator and replaced it with straight piece of pipe? Thanks again guys for your help...

 

Stillen metal matrix pads +1

 

Ok....the midpipe is a straight pipe with a resonator. If you want to take out the resonator then it will be just a straight pipe. It is likely going to be much cheaper to just put in a straight pipe than to buy a midpipe and pay to have it altered. As for the sound involved - not sure that there is anyone who has done this so not sure you will get an answer on that one. IMHO, you should look into the straight pipe only option if you want that. Might even be cheap enough that you can just risk it and then if it sucks change it.

 

There's a member on here with an 05 and he just cut out the stock resonator on the sedan middy and put a straight pipe. It sounded really good paired with a JWT PC and it wasn't too loud to be annoying either. No need to buy the coupe middy if your just going to take out the resonator. He said it was around $50 from a local exhaust shop. -05Blk- is the member's name.

-GP-

 

Way different? The coupe sounds better, with that benefit as a starting point, that coupe with a straight pipe sounded awfull, ya know the kind of sound where you thought to yourself "who would do that to their car". Sounded like someone that doesn't how to mod a exhaust was at work.

 

The oem sedan mid pipe constrict's flow by narrowing the flow path quite a bit when the exhaust enter's the premuffler body. A historic look at past and present G and Z exhaust mod history won't show but a handfull of non resonator equipped cars, even the Z community that isn't nearly as conservative as we are are and is much more likely to want louder system's, does not end up with many straight pipe mods. Granted it's not something that can't be reversed, but I'll argue here and now that it's not something that should be done if you want a decent sounding exhaust.