4.7 Vantage exhausts

[yeti]

Thanks to the helpful people at HWM, I now know that my August 2010 build car is in fact a 2010 spec car and not a 2011 spec car as was thought. Typically August cars are after the factory shut down so you get the next model year. Not so here.

Now I know I am Euro 4 with no cats built into the manifold; primary and secondaries inline downstream.

The car sounds lovely at 3000rpm or above but stood next to it opening the garage, I realised at idle I cannot hear the exhaust at all, all I can hear are belts and pulleys. My SL was louder. Fuse 22 is pulled, I physically checked as I couldn't believe it. My friend's 4.3 as standard sounds so much better at idle and low revs.

My plan when I thought it was a 2011 car was to get secondary de-cats and enjoy the noise for comparatively little cash but that's pointless now.

Most likely for me now are primary 200-cell sports cats and secondary delete.

I am familiar with the BR offering at 1700 + VAT, what else is out there and who's had what done please on a 4.7?

These seem very reasonably priced and coupled with their cats, not far off what BR charge just for sports cats. Is there a reason they're so cheap..?

https://www.topgear.co.uk/aston-martin-v8-vantage-...

[Dungman]

I also have an early 4.7.

Initially I fitted a second hand pair of Quicksilver 200 cell cats. Sounded good but caused running issues.

Mike at BR was very helpful and solved all issues with a remap. I am in NE Scotland, and he was happy for the ECU to be sent to him by courier.

In retrospect it would have been easier to have went to BR from the outset.

[yeti]

Dungman said:

I also have an early 4.7.

Initially I fitted a second hand pair of Quicksilver 200 cell cats. Sounded good but caused running issues.

Mike at BR was very helpful and solved all issues with a remap. I am in NE Scotland, and he was happy for the ECU to be sent to him by courier.

In retrospect it would have been easier to have went to BR from the outset.

Yeah HWM did warn of possible emissions lights, I thought we’d be in the clear for that and that they were just fear mongering

[Handyman2009]

I have a 09 Vantage with a 4.7L and fitted Velocity AP 200 Cats to mine along with a tune and custom remote exhaust valve controller. For me this is the best sounding V8 Vantage and everyone seems to agree with me. I do get a few Lambda faults but not on a regular basis, maybe once a summer or so

[Dewi 2]

yeti said:

Thanks to the helpful people at HWM, I now know that my August 2010 build car is in fact a 2010 spec car and not a 2011 spec car as was thought. Typically August cars are after the factory shut down so you get the next model year. Not so here.

Now I know I am Euro 4 with no cats built into the manifold; primary and secondaries inline downstream.

The car sounds lovely at 3000rpm or above but stood next to it opening the garage, I realised at idle I cannot hear the exhaust at all, all I can hear are belts and pulleys. My SL was louder. Fuse 22 is pulled, I physically checked as I couldn't believe it. My friend's 4.3 as standard sounds so much better at idle and low revs.

My plan when I thought it was a 2011 car was to get secondary de-cats and enjoy the noise for comparatively little cash but that's pointless now.

Most likely for me now are primary 200-cell sports cats and secondary delete.

I am familiar with the BR offering at 1700 + VAT, what else is out there and who's had what done please on a 4.7?

These seem very reasonably priced and coupled with their cats, not far off what BR charge just for sports cats. Is there a reason they're so cheap..?

https://www.topgear.co.uk/aston-martin-v8-vantage-...

Hello Lewis,

How can you have primary 200-cell sports cats and secondary delete, when you (fortunately, 2005 to 2010) only appear to have one catalytic converter for each bank of cylinders?

My V8V is MY 2009, so very likely has an identical exhaust arrangement to yours (single pair of cats, within which are 400 cell and 900 cell matrices).

BR made an 'adjustment' whereby the 400 cell matrices remain in place. A 3-way exhaust valve switch was fitted (very neatly completely out of sight) and the software was 'updated'.

There is now a wonderful growl at tickover (can be quiet by switching the exhaust valves to closed), sound in the cabin on steady throttle is little changed (valves open), but under hard acceleration, a marvellous thunderous roar occurs (valves open). Just the perfect balance.

The sound remains characteristically Aston Martin and my car must now be one of the best sounding V8Vs, without having any unnatuaral resonanses, or artificial loudness.

It is a low cost way of achieving more orchestra. No MoT problems with either emissions (have not changed), or visible exhaust system appearance changes (remains looking exactly OEM).

Your only problem might be, I think workshops have now become scared of altering exhaust systems.

[yeti]

Dewi 2 said:

How can you have primary 200-cell sports cats and secondary delete, when you (fortunately, 2005 to 2010) only appear to have one catalytic converter for each bank of cylinders?

Aha; so there are only two cats anyway rather than 2 x upstream and 2 x downstream? Google doesn't show a picture of the standard set up. So it's just a matter of replacing 2 x 400s for 2 x 200s, thank you.

.

[Dewi 2]

yeti said:

Dewi 2 said:

How can you have primary 200-cell sports cats and secondary delete, when you (fortunately, 2005 to 2010) only appear to have one catalytic converter for each bank of cylinders?

Aha; so there are only two cats anyway rather than 2 x upstream and 2 x downstream? Google doesn't show a picture of the standard set up. So it's just a matter of replacing 2 x 400s for 2 x 200s, thank you.

For V8V 2005 to 2010, this is the only catalytic converter (obviously two of them, one for each bank of 4 cylinders).
You can see the different heat mark colours. They show the positions of the two internal individual 'brick', matrices. One is 900 cell, the other 400 cell. It is the 900 which can be removed. The is no cutting of the casing. Access for matrix cutting being through the end of the pipe.




We can see the longest heat mark is to the right, so that must be the 900 cell 'brick'.

Some posters have found a 200 cell cat. as being just too loud, so 400 does appear to be perfection.

Additional in-manifold cats. began to be fitted at some point in 2010, because regulation then required faster heating of cats.

Edited by Dewi 2 on Thursday 14th May 16:39

[yeti]

I seeeeee… so there are sort-of two sets on each side, just in one unit. I’ve misunderstood, thanks.

This does seem to be a the best noise bang for buck, does it provide any performance / responsiveness gains?

[Buzzi77]

yeti said:

Thanks to the helpful people at HWM, I now know that my August 2010 build car is in fact a 2010 spec car and not a 2011 spec car as was thought. Typically August cars are after the factory shut down so you get the next model year. Not so here.

Now I know I am Euro 4 with no cats built into the manifold; primary and secondaries inline downstream.

The car sounds lovely at 3000rpm or above but stood next to it opening the garage, I realised at idle I cannot hear the exhaust at all, all I can hear are belts and pulleys. My SL was louder. Fuse 22 is pulled, I physically checked as I couldn't believe it. My friend's 4.3 as standard sounds so much better at idle and low revs.

My plan when I thought it was a 2011 car was to get secondary de-cats and enjoy the noise for comparatively little cash but that's pointless now.

Most likely for me now are primary 200-cell sports cats and secondary delete.

I am familiar with the BR offering at 1700 + VAT, what else is out there and who's had what done please on a 4.7?

These seem very reasonably priced and coupled with their cats, not far off what BR charge just for sports cats. Is there a reason they're so cheap..?

https://www.topgear.co.uk/aston-martin-v8-vantage-...

I installed these on my Vantage. They are well made and the noise is loud. Maybe too much. You can put a valve closing and opening system instead of the fuse 22. Not speeding too hard in the city is the secret.

[XMark]

I also have the top gear high flows, very happy with them but would like even more noise, I think I’ll have to do the manifolds too