Anybody have a set of old 4.5 centre pipes?

Anybody have a set of old 4.5 centre pipes?

Author
Discussion

WIL35

Original Poster:

422 posts

155 months

Tuesday 10th September
quotequote all
....they want to sell?

Only asking because I currently have the ACT big bore system on my 4.2, which is great for car meets and short blasts. However I would quite like the option to put on a more civilised exhaust. I have found an original 4.5 back box and I have the ACT adjustable length silenced decats, so I should be able to fit the back box.

I know ACT have them available at £250 and I would get those if the back box I had was from a 4.2.

Thanks

pmessling

2,122 posts

148 months

Wednesday 11th September
quotequote all
I do but they need a patch welding in. Which I can do

WIL35

Original Poster:

422 posts

155 months

Wednesday 11th September
quotequote all
In the interests of recycling, that sounds great!

PM sent

Byker28i

19,171 posts

162 months

Wednesday 11th September
quotequote all
Don't put in the big bore centre pipes? ACT have some smaller ones with additional silencing in (or used to have).

My ACT system is quieter than the original or SP equivalent

WIL35

Original Poster:

422 posts

155 months

Wednesday 11th September
quotequote all
This is what I have at the moment, with ACT stainless manifolds:



It is 105db at 4k revs (metre from the exhaust at 45 degrees) and it is 85db inside the car at 70mph!

Byker28i

19,171 posts

162 months

Thursday 12th September
quotequote all
Looks very similar to mine, only mine is a 2.5" bore, similar noise levels as well, only mine is decatted. I don't find it a problem, can easily have a converstion at motorway speeds, listen to the radio..



tailpipes have silencing as well

Byker28i

19,171 posts

162 months

Thursday 12th September
quotequote all
Been on now for 11 years - still looks good, works fine.

Mr Cerbera

4,290 posts

175 months

Saturday 14th September
quotequote all
Thanks lads, this thread has given me the opportunity to ask a question I've had for ages:-

Given that the driver's side cylinders are quite a way back down the line from the Passenger's,
do you guys run the same difference at the very end of the tail pipes (i.e passenger's sticks out way more)
or do you 'equalise' the difference somewhere down the exhaust tract ? - and if so, where ?

Many thanks for all comments - No matter how laughable, annoyed or informative they may be ears

PJ
thumbup

WIL35

Original Poster:

422 posts

155 months

Monday 16th September
quotequote all
Mr Cerbera said:
Thanks lads, this thread has given me the opportunity to ask a question I've had for ages:-

Given that the driver's side cylinders are quite a way back down the line from the Passenger's,
do you guys run the same difference at the very end of the tail pipes (i.e passenger's sticks out way more)
or do you 'equalise' the difference somewhere down the exhaust tract ? - and if so, where ?

Many thanks for all comments - No matter how laughable, annoyed or informative they may be ears

PJ
thumbup
Hi,

Not totally sure what you mean, but even though the pistons/cylinders are offset, the ends of the manifolds where the catalysts join are in line. Presumably one of them has a slightly longer overall length

Byker28i

19,171 posts

162 months

Tuesday 17th September
quotequote all
I have the ACT tuned length manifolds, replacing the old cast ones which kept cracking.
All along the exhaust every joint is in line with the other side, so manifold to cats, to center pipes to rear pipes

Mr Cerbera

4,290 posts

175 months

Wednesday
quotequote all
Thanks guys,
Musta been the parallax then....