3.9 V8 exhaust options

**Neesaan1via** · 10th September 2012, 08:38 PM

Hey guys , just wondering what most of you run exhaust wise running a v8 ?

Looking at making a new 1 , probably from headers back .

How many mufflers do most of you run ect ?

I'm thinking straight through with 1 medium size muffler would do the job ?

Cheers

**Gary S11** · 10th September 2012, 09:07 PM

Hi, all I have on my 96 D1 is a straight through lukey, and 2.5" pipe after it, quiet on the highway at 110. Cackles beautifully from 2500-3500 rpm then just a lovely howel from
3500- to infinity and beyond....Gary

**OneGoat** · 10th September 2012, 09:40 PM

Although my D1 now has a 4.6 I'm running a set of Pacemaker extractors to a single 2.5" pipe with a single straight through Lukey. Sounds good and you notice the power difference to the original set up. Cheers

**vogue** · 11th September 2012, 07:57 AM

Same, 2.5" from y pipes one with straight through muffler in middle, no resonator, sounds great

**DiscoClax** · 11th September 2012, 08:21 AM

G'day. I've got a Ford BA XR6-Turbo Ute (same as F6 Ute) centre muffler (dual in & out - 2-1/4") running into twin 2" pipes over the axle and a couple of hot-dogs in the rear wing and BA XR8/Pursuit Ute perforated tips. Chopped the take-down pipes where the two become one (each side) and ran 2-1/4" pipes to the centre muffler (with 1-1/2" balance pipe). The BA XR6T muffler is about the biggest you can fit in the space, stainless steel, straight-through, and cheap as chips as just about every exhaust shop will have some they pulled out of a customer car. Big straight-through mufflers give the best flow vs sound attenuation. The front pipes I have are a bit big for a baby 3.9 but a good size for something closer to 5.0ltrs. Sounds great and is very quiet on the open road, with a meaty growl when giving it some off-road without being anti-social driving through camping grounds, etc.

Fitting Hedman headers soon when the new (long-term project) stroker engine goes in

C'mon Christmas...

Good luck with it

P.S. I'd recommend that you consider fitting bolted flanges in key locations. Makes working under there so much easier when you can just unbolt a section of exhaust.

**Nathan78** · 11th September 2012, 12:59 PM

Hi mate I have 3.9 auto in a D1
I run 2 1/2 off the stock headers with one straight throw muffler
Sounds tough as !! As said above The bark and crackles are great

**Flemo** · 21st September 2012, 06:44 PM

Im about to throw a custom 2.5inch on the 3.5L v8... might do a youtube post up, am getting them to throw a resonator on it to keep things... quietish.