Wellnotexactly

Looks like you need a diff bushing!

Calg37USMC

Diff bushing for sure.

SkyG37

Thank you guys for the replies. You guys are correct. I'll do a bit of research and decide if I go OEM or aftermarket and have my shop fix it

I​​​​​​I installed the exhaust and it is def louder than the ark. One of the exhaust tips hangs lower than the other also my mechanic welded a tiny tac on the tips do they didn't flex. I can remove the tac with a simple cut if I wish to remove the tips.

I'll try and make videos but I'm in the car right now about to go home. From start up and a few 3.5-4k revs, it's louder for sure. Sounds nice too.

SkyG37

Will get a drive by hopefully soon. Best I can do in the meantime. Awful video but few revs to 3k and few to 4.5k.

Wellnotexactly

Your “awful video” has me scrolling through Z1 motorsports right now for HFC..

SkyG37

Hehe remember though, these are the older ones with 200 cell count. I bought my Z1s cause members who ran them said positive things about them. On top of that, the price point was A1 compared to other options.

The new ones are 100 cell count. Not sure how much it would change. Price is about the same. I paid $380 shipped I think. Regardless, I'm already in love with the exhaust. Is it louder for sure though.. way louder. But to me, it's in a good way. Crackles and pops are louder as well lol

woofersus

iTrader: (3)

I had my topspeed pro1 y-back system installed last Wednesday. Aaaannd......Instant regret. It's way too loud, and intrusive in the cabin. (not a low resonant drone, but just the volume level which peaks in the midrange at 3-4k rpms, so it's worst when I'm lugging a bit at 35mph) Maybe it's louder partially because I have RHFC's also installed, but I call shenanigans on the Topspeed's 97db claim. I have an SPL meter and will measure next week if I get a chance.

Also, but dyno NOT approved. I feel like I've lost top end power. Maybe there's some kind of issue with the change of size from the y-pipe or something. Either way, I think I'm going to have the stock pipes put back on. Such a bummer.

VQ37VHR13

Any rasp or drone with that set up?

SkyG37

On my way home from the exhaust shop, I took a few "detours". From what I remember (was too excited), it seemed like less rasp than my previous exhaust. As for drone, I'm going to have to answer that tomorrow as I'll have a 25mile commute to college there and back so I should have a better idea. But when I was driving home yesterday non-spirited, it was very quiet. But once you downshift to about 4k and step on it, it's STTTUUUPPPIIIDDD loud.

If each system was paired with my Z1 HFC, I would say ark was a 7/10, this is 9/10. I would say Gthaus is about 9.5/10 and tomei single pipe would be a 9.8/10. This is all WOT

Rochester

iTrader: (9)

A 100 cell count, huh? Might as well be a test-pipe. But I suppose as long as you don't trip a check-engine, and you can get through a state inspection... more power to you. I didn't know Z1 was going that route.

SkyG37

Im sorry to hear. Do you think it is mainly due to the RHFC though? And that's kind of odd you feel like you LOST power. But regardless, I'm sorry to hear about the bad experience. One thing I've learned about exhausts is, unless you hear them in person, you're taking a gamble on the sound. YouTube does not to justice on most exhausts, especially on sound.

Ricio1991

I currently run top speed y back with ART pipes and I’m satisfied the way it sounds for the price. Since I added the resonated xyz pipe from Motordyne it quieter now. Top Speed is quiet compared to other exhaust. I think you should of went with invidea q300 is you really wanted to quiet or stayed stock. Yes there is a drone in the cabin but most exhaust do unless you spend a k or more on a quality exhaust. For 550 the y back is good buy imo

SkyG37

Mini update: the e370 with the Z1s are not raspy at all. Sounds like a gtr except with no turbos , literally.... It's very distinct and exotic sounding. Not sure if that's due to not having stock cats, but it's very unique I feel like. Best and also the loudest part if not under WOT is downshifting. They are addicting but loud.

VQ37VHR13

Very good to hear, looking forward to more vids from you. I'm trying to convince myself that it won't be too bad as far as the loudness lol. I know it's early, but do you think it's not too loud to DD?

SkyG37

Well this is my daily. As of right now, I want to drive everywhere just to hear it .. so for me, I can daily drive it. I feel with this exhaust, no matter what, people will know you have an aftermarket exhaust. That is because the sound is so unique and exotic that they know that's not how a stock G37 sounds. Other then that, I literally think it sounds like a mini gtr. The best comparison I can put to it. I could be totally wrong because I haven't heard it from the outside but in cabin / with the windows down, it sounds great. I also thought it was going to be higher pitched when it's actually not but more of an exotic pitch.

I'll tell you about drone in a few hours. Gonna do a quick 10 mi trip on the freeway really quick so I'll test out the drone. So far though, I am happy I made the purchase