Most liked posts in thread: Straight exhausts on R53

Yea, a couple of guys in our club with straight exhausts are using 2 small motorcycle type batteries with good results. They actually lay down, and end up being level with the seating area floor, if you know what I mean? Then they added a floor cover over the top to make it all level. Comes out really nice Think all those pics can still be found here, or hate to say, on NAM.

 

It's been proven many times you do not need to move your battery to have a straight exhaust on an R53. I have had one on my car and we put it on my friends yellow Mini for the Dragon last year. The link is in a post above. I have my Milltek on now but I think I will put the straight exhaust on again this year for the Dragon.

I will also say you have lots of room for it under the battery box and I have NEVER scraped the exhaust and my car rides low.

 

Dave, thing is, he already has his box removed, so no help for him

 

Jerry, are you sure you ended up with the version of the exhaust with the resonator alongside it? DrPhil removed the version without the resonator because of a horrible drone, he says. I've only heard good things about the resonator versions. The other possibility would be that the thing has a hole in it by now, or a broken weld. Be sure the system is operating at its best before you condemn it.

 

So, did Dr. Phil buy a new MINI or is he into something else now?

 

Yup, the resonator is there. I haven't gotten under it to check for holes or cracks. But I will soon because it's got the SES light on and the codes are pointing to the emissions stuff underneith. These are the codes: P2096, P1692 , P0136.

And Minidave, while doing research on this car before I bought it, I came across a thread where Dr. Phil had bought a Porsche.

And I'm looking for those pics of the smaller batteries. Tht would be a great thing and save me from fab'ing up a battery box!

 

I'll look for them also. If anything, I will take a picture of one of the setups this weekend

 

He bought a Porsche Cayman S pretty much right after his MINI made it in the magasine.

Such a nice car...

Congrats to the new owner.

 

Hate to bring an old thread back to life but... currently I have a Borla Sport Exhaust in the GP. With the lack of rear seats, it's pretty damn loud and drones a bit. I like the noise but I think it can be refined. My Supersprint exhaust from my last R53 jumps to mind. It's very cabin friendly below 3200 RPMs but rips beyond that. I'm quite interested in the G4 straight exhaust, because of the material used, the company and it's potential. Thinking about the street set up, do you think it's louder in cabin than a Borla? Do you have any drones?

 

:cornut: When you pulled the seats did you put a 'sound deadening kit' in or do a home made sound deadening system? Kits are out there.

Jason

 

He has a GP. Came without rear seats.

 

When I'd did my straight back exhaust with a rear seat delete I had to apply 2 layers dynamat to bring the exhaust level down inside the car.

I also used thick felt floor padding glued to the underside of my rear seat delete to muffle the extra sound.

 

Ear plugs woulda been easier....

 

Hmm good feedback. Will consider this as an option. I wish there are more videos / feedback about the G4 straight exhaust.

 

Hmm. That's great feedback, is this the most current information? I only ask because I see that they have a street set up on their site. Also, subtle may not be what I'm going for. Refined might be the better word. I love the popcorn poppers, but it's the droning that gets to me. Especially since the GP has a lack of rear seats. I wonder if anyone knows whether this is louder than the Borla Sports exhaust or not.

 

I actually wear earplugs for every drive more than 20 minutes/above 75 MPH. I have them for my passengers as well.

 

I've driven the Borla Sport on my R53, and helped develop the aggressive and street versions of the G4 (the "street" is no longer offered since the front muffler wasn't working out the way they wanted).

The Borla makes sweet noise, especially in the 2200-2600ROM range, and calms downa bit on the highway. I never really noticed it making much power more than the stock exhaust.

The G4 makes tons of power (12++ on the dyno, as much as 15 on some R53's), and saves some 25lb total weight over the stock heavy system. It sounds quite sweet across the rev band, but can get loud on the highway. I wish I'd recorded mine when it was on!

Where are you located, and are you coming to Pittsburgh for the Vintage Grand Prix in July (www.pvgp.org)? You would be able to hear all those systems at once there...