Alloy may be better at heat transfer, but as the item is an inlet plenum not an Intercooler, and is on the cold side of the engine I really don't think this will be any form of issue at all.

The reason I've made this in stainless is on the grounds of strength - a friend has a 540bhp Escort Cossie, his ally plenum split twice. He now runs this same plenum with no problems.

As mentioned by EscosNige, he was supplied his plenum by Reyland, who in turn has bought it from us. I think that is fair endorsement

Link to my ad on here:

https://passionford.com/forum/viewtopic.php?t=180132

And to my ad on ebay:

http://cgi.ebay.co.uk/ws/eBayISAPI.d...MESE%3AIT&rd=1

Currently on £165 which is bargain IMHO.

Any questions anyone has please fire away and I'll try and help out!

Simon