4 inch Exhaust

[r34unit]

Hi 
Just wondering who has built a 4 inch exhaust system with two mufflers that is very quiet. Is it possible ? which mufflers did you use ?

Thanks in advanced  

[Lithium]

Have just been discussing this kind of thing recently.

Paging @Piggaz and @Mick_o... 

 

[r34unit]

32 minutes ago, Lithium said:

Have just been discussing this kind of thing recently.

Paging @Piggaz and @Mick_o... 

 

sorry is there another thread ? 

[r32-25t]

Depends what you mean by very quiet?you’ll never make it sound stock but getting something that is very streetable without drone is definitely possible. 

A lot of people are using AES mufflers now and the results have been great, I’ve got a set for my car (getting done next week) and I heard Andrew Hawkins car on the weekend and am confident in my choice 

[Lithium]

9 minutes ago, r34unit said:

sorry is there another thread ? 

Nah, offline - but they have had good results making 4" exhaust flow well without being too loud so hopefully one of them will weigh in 

Edited July 18, 2019 by Lithium

[JustinP]

I'm very interested about this too, I'll be building a 4" system myself soon.

[r34unit]

I know Vibrant performance do a 4inch muffler, dont know how good or who stock them locally (Melbourne) 

[Myskyliner33]

I did mine using Reaper mufflers from qld. 

not to loud and good quality gear. 

[r34unit]

@Myskyliner33 which mufflers did you use ?
Any videos ? 

[Myskyliner33]

www.reaperengineering.com

 

no videos. 

[JustinP]

For those building their own exhaust systems at home, what is the best way you've found to make accurate cuts on larger diameter stainless?

I've started building a 4" system, using a cold saw (dry type) and it's been a pain in the ass.

[Shoota_77]

@JustinP I just used an angle grinder for mine then finished it on the belt sander to get a perfect mating face. I used a 125mm angle grinder with the thinnest blade I could find. Cuts through it super fast. 

[JustinP]

@Shoota_77 Thanks mate, good idea. I'll give that a go.

[Mick_o]

I use Reaper Engineering mufflers I'm his first Sydney registered installer lol. 

You can see some of my work on their Facey page. "Big Mick Fab" 

Its quality gear! 

[hattori hanzo]

can reaper send you an exhaust or do they need the car in the workshop? 

[SiR_RB]

I always get told how quiet my car is 

no drone no problems from the popo or members of the public

full 4” turbo back exhaust 

AES oval mid muffler

AES rear muffler 

all 4” straight through 

[Mick_o]

12 hours ago, hattori hanzo said:

can reaper send you an exhaust or do they need the car in the workshop? 

He supplies mufflers to order mate. Measure up what suits you and check out his gear and order up the style you like ?

[R.3.2.G.T.R]

I always get told how quiet my car is 
no drone no problems from the popo or members of the public
full 4” turbo back exhaust 
AES oval mid muffler
AES rear muffler 
all 4” straight through 

Do you also use their cutout valve?

[SiR_RB]

No just mufflers 

[r32-25t]

 4in exhaust with aes mufflers, No cat only the 2 mufflers and everything is straight through