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Exhaust ideas

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Discussion

Byker28i

5,699 posts

114 months

Monday 8th October 2012
quotequote all
DarrenRGD said:
Byker28i said:
Act have a quiet system. I have it fitted to my car. It has silencing along the long centre pipes, the sports rear type silencing, plus extra silencing in the tailpipes. Its 106 db decanted on my car and I'm not missing any power (380bhp) and it's significantly lighter then the original back box, and has lots more road clearance.

They also have some additional silencers instead of cats to drop the volume further.
106db is really loud! I need to get mine quieter than than for trackdays
ACT do track day cans that slip on the tail pipes reducing the noise further by 8-10db. I have seen systems with bolt on replaceable tailpipes. Also you can slip the cats back in and you get anther 8-10db if needed.

Mine is 106db decatted at 4500+ revs, or I've managed between 96 & 98db with the trackday cans on, depending on who's measuring. At normal driving it's quite refined.

pilmar

Original Poster:

135 posts

150 months

Monday 8th October 2012
quotequote all
Is there much difference between the 4.2AJP8 backbox and the 4.0 SP6 backbox?

Aandytvr1

93 posts

51 months

Monday 8th October 2012
quotequote all
If helps

I have in my garage back box for Cerbera speed 6 2003

I took it of some now four years ago

I fitted new sports box ( too loud if honest ) then sold the car

I would have no idea what's it worth but if you are interested , I can make available etc

I will check to see if I can find an ideal guide when it comes to it's value

If wanted just let me know

Andy ( sadly misses his Cerbera )
Drives a griff now a days great but not a Cerbera

Aandytvr1

93 posts

51 months

Monday 8th October 2012
quotequote all
If helps

I have in my garage back box for Cerbera speed 6 2003

I took it of some now four years ago

I fitted new sports box ( too loud if honest ) then sold the car

I would have no idea what's it worth but if you are interested , I can make available etc

I will check to see if I can find an ideal guide when it comes to it's value

If wanted just let me know

Andy ( sadly misses his Cerbera )
Drives a griff now a days great but not a Cerbera

Tanguero

4,325 posts

98 months

Monday 8th October 2012
quotequote all
pilmar said:
Is there much difference between the 4.2AJP8 backbox and the 4.0 SP6 backbox?
The pipes that connect to the intermediate pipes were about 150mm short and were closer together on the SP6 box that I put on my 4.2

I have just taken mine off to weld on some stainless sections to make it all fit properly after a few years with it bodged on with a couple of short lengths of mild steel pipe between the back box and intermediate pipes.

If you want to quieten your 4.2 for track days, I run a linked decat and standard (SP6) back box and have regularly passed 101dB noise tests at sprints. The noise measurement seem to vary from track to track and the marshals have told me that it measures variously between 95 and 100 dBA depending on which track it is!

FUBAR

16,882 posts

135 months

Monday 8th October 2012
quotequote all
Byker28i said:
I have seen systems with bolt on replaceable tailpipes.
:cough: slip on not bolt on wink


good40

286 posts

41 months

Tuesday 9th October 2012
quotequote all
Gazzab said:
Just trying to agree some stuff.
cloud9

Gazzab

16,586 posts

179 months

Tuesday 9th October 2012
quotequote all
Not quite cloud 9 but hopefully will be a positive statement shortly.

Byker28i

5,699 posts

114 months

Tuesday 9th October 2012
quotequote all
FUBAR said:
Byker28i said:
I have seen systems with bolt on replaceable tailpipes.
:cough: slip on not bolt on wink

I've seen bolt on ones as well:

pilmar

Original Poster:

135 posts

150 months

Tuesday 9th October 2012
quotequote all
Aandytvr1 said:
If helps

I have in my garage back box for Cerbera speed 6 2003

I took it of some now four years ago

I fitted new sports box ( too loud if honest ) then sold the car

I would have no idea what's it worth but if you are interested , I can make available etc

I will check to see if I can find an ideal guide when it comes to it's value

If wanted just let me know

Andy ( sadly misses his Cerbera )
Drives a griff now a days great but not a Cerbera
I'll have it off you. I've sent you an email.