The heat shield on my 111R has started to fall apart, behind this (rear n/s):
This is what it looks like from behind the rear wheel:
It looks like you can buy the sections here: http://www.deroure.com/diagrams.asp?TBL=5782&MAK=1&MDL=11&SMA=0&SMO=0&ST=&SC=0
Items 5, 6 and 31 I think.
However, they cost around 50quid each! Ouch! Does anyone have them spare, following an exhaust upgrade or something they would like to sell on?!
Also, how easy is it to replace? I can't see how you can get to it, maybe remove the rear wheel?
Has anyone done a comparison between an S2 k-series manifold and an aftermarket 421?
I've got a 2bular 421 on my S1 111S which has given much improved torque over the standard item. The only downside is that I'm sure it's quite a bit noisier than before, but as it was fitted so long ago I can't remember what it was like! I think a lot of the change in sound is probably down to the change in material, from a cast item to tubular stainless. It may not be noisier, just more metallic, if that makes sense.
I've been on a bit of a mission recently to try and reduce noise volumes in the car - it's an age thing I'm pretty sure! So far I've added carpet, put the std airbox back on and fitted a quieter silencer and it has made the car so much more enjoyable (for me) without really taking anything away. The next thing on my list to look at is the manifold.
I've read a few posts over the years that suggest there are two potential improvements that could be made to an S1 on the exhaust side whilst staying pretty standard. The first is to grind out the clag in the standard S1 manifold, the second is to fit the S2 manifold and link pipe.
So, am I right in saying that the standard cast items are quieter than a stainless system? Also, would a cleaned up standard S1 or S2 system be that much different in performance terms to the 421 on an otherwise standard VVC S1?