Exhaust build, over or under axle setup?

**JDMJNKY** · 23rd January 2009, 01:05 PM

I chose under the diff, w/ a flex pipe! if your not lowering your car either setup will work. but if you are lowering your car 2-3" a under diff is highly recommended.

Joel

**Vezza** · 24th January 2009, 12:51 PM

Awesome, thanks for the info guys.

***urban_ninja*** · 24th January 2009, 12:56 PM

as long as its not to loud and is not hitting the ground youl be right its only a 86 heheheheheheh joikes jokes. na go under its way better.

**blair** · 24th January 2009, 08:45 PM

i run underdiff 2 1/4 with flange just infront of diff.

is level with my rails, so if my rails were >100mm then yes it would be legal lol.

**Vezza** · 25th January 2009, 10:23 PM

Yep, I've nearly finished tacking it up running under the diff. Doesn't look too shabby. The car is lowered about 2" at the moment and it sits about 50mm below the diff and at about 130mm off the ground.

**Vance** · 25th January 2009, 10:32 PM

i had my last ae86 2.5inches lower and ran over diff.

i hit the exhuast that many times with my diff that it broke welds on it. as soon as i got that exhuast leak my car ran like balls and sounded rubbish.

my current ae86 has under diff and i wouldnt have it any other way

**Oly AE86** · 27th January 2009, 06:56 PM

I had my new 3" system under the diff. Got defected because it was too low at the point under the diff.

Since then moved the fuel pump closer to drivers side and had the system re-made over the diff. Bangs a little if you have rear passengers, but that is less than 5 times a year. Go over the diff if you can.

**86JAP** · 31st January 2009, 08:41 PM

Im running a mandrel bent underdiff with 90mm clearance at the lowest point, could prob move it up further but haven't had any trouble at all with bottoming out over bumps n shit..