Backbox Delete???

4.2 V8 32v Naturally Aspirated - 414 bhp
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Fatneck73
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Backbox Delete???

Post by Fatneck73 » Tue Oct 29, 2019 10:35 pm

Hi

I have replaced the centre res with 2 straight pipes and I have a nice v8 rumble...but I want more.

Has anyone also removed the backbox’s...completely. Pipe all the way through. Rather than Milltek etc.

Thoughts?

James1984
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Re: Backbox Delete???

Post by James1984 » Wed Oct 30, 2019 1:27 am

No, but I did start and Rev my car a little bit with just the decat downpipes on and it was very loud
2007 B7 RS4 Saloon, Phantom Black, Forge Oil Cooler Kit, custom home made air feed, H&R Coilovers, H&R anti roll bars, 10mm H&R Spacers, Milltek decat downpipes, Milltek Non Res Valved Exhaust, Reyland Motorsports front & rear discs with Hel braided Hoses, full underbody overhauled inc powdercoated subframes and arms, 034 solid subframe bushes and every joint, arm or bush replaced.

**wilkie**
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Re: Backbox Delete???

Post by **wilkie** » Wed Oct 30, 2019 4:32 pm

I'm in the same position, I've removed the resonator and although better, I'd like more too.

There's a discussion here: https://www.audizine.com/forum/showthre ... ng-the-RS4

Seems the consensus is that it'd sound <beep>. The best compromise on sound vs £ being gutted pre-cats with deleted secondaries/resonator.

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Jon_J
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Re: Backbox Delete???

Post by Jon_J » Wed Oct 30, 2019 7:12 pm

Surely the engine needs a certain amount of back pressure? It would run like a dog no?


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RS4 B7 Sprint Blue
- Titanium Pack
- Black Optics
- B16's
- RNSE2 with AMI
- Reverse Camera
- Full Stereo install

S5 8T Cab White
S4 B7 Phantom Black (gone but not forgotten)
A4 B7 Avant 2.7 TDI Brilliant Red
A5 Cab 3.0 TDI Phantom Black

Mav8
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Re: Backbox Delete???

Post by Mav8 » Wed Oct 30, 2019 8:05 pm

This is mine,may help a bit.
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MikeFish
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Re: Backbox Delete???

Post by MikeFish » Wed Oct 30, 2019 8:15 pm

Mav8 wrote:
Wed Oct 30, 2019 8:05 pm
This is mine,may help a bit.
Your wheels and tyres look a bit fooked.

You still have some resonators up front though. Is there a valve to switch between no backbox and back box or does some pass through the backbox or not?

Mav8
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Re: Backbox Delete???

Post by Mav8 » Wed Oct 30, 2019 8:34 pm

MikeFish wrote:
Wed Oct 30, 2019 8:15 pm
Mav8 wrote:
Wed Oct 30, 2019 8:05 pm
This is mine,may help a bit.
Your wheels and tyres look a bit fooked.

You still have some resonators up front though. Is there a valve to switch between no backbox and back box or does some pass through the backbox or not?
Lol ride was a bit harsh😂😂

Works the same as OEM via the sport button switching between back box or straight through the aux pipes
Mav8
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Jon_J
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Re: Backbox Delete???

Post by Jon_J » Thu Oct 31, 2019 9:22 am

Mav8 wrote:This is mine,may help a bit.
Still love this


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RS4 B7 Sprint Blue
- Titanium Pack
- Black Optics
- B16's
- RNSE2 with AMI
- Reverse Camera
- Full Stereo install

S5 8T Cab White
S4 B7 Phantom Black (gone but not forgotten)
A4 B7 Avant 2.7 TDI Brilliant Red
A5 Cab 3.0 TDI Phantom Black

Fatneck73
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Joined: Sun Apr 17, 2011 9:02 pm
Location: Essex

Re: Backbox Delete???

Post by Fatneck73 » Thu Oct 31, 2019 1:54 pm

Any sound clips Mav8? Who made the system? How much etc?

Mav8
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Re: Backbox Delete???

Post by Mav8 » Thu Oct 31, 2019 7:38 pm

Fatneck73 wrote:
Thu Oct 31, 2019 1:54 pm
Any sound clips Mav8? Who made the system? How much etc?
It was made by Badger at Hard knock speed Shop Bicester,can’t remember exactly how much but was about the same as a miltek ,but I knew a couple of other lads who had systems built.some pics of his work

Where in Essex are you based.
Mav8
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