Azzazzin

Both the S8 and A8 are 4.2, the A8 having only 310 HP, and the S8 with an amazing 360 HP...

I found a chip that increases the A8 by 22 HP, but is there a chip that will bring it to S8 levels (50+ HP) or more?

Ming Blues

The S8 has a different muffler and air intake, also I think different camshaft. Just a chip can't do it all!

April

Yes, lots of headwork and even different gearing. Search forum for differences.

ryoung

since HP peaks at 6200 rpm in the A8 versus 7000 rpm in the S8, I'd be very surprised if they use the same cams. For the same reason, the "short length" of the variable length runners of the intake manifold is probably shorter in the S8.

chucklane

22 HP for A8 chip, thats good how about the S8?

ryoung

Price unknown<ul><li><a href="http://www.bb-automobiltechnik.de/english/mau_a8s8.html">B&amp;B Automobiltechnik</a></li></ul>

April

May also require higher octane fuel than we normally see here.