Im told that COSWORTH 4X4 INLET MANIFOLD is a good UPGRADE to put on a 2wd cosworth as more air can get in is this right or rong

 

You're only talking a very small difference between the 2wd and 4x4 item. The best one is the EECIV one.

 

Mike to be fair you are talking 40 odd BHP capability over the 2wd one...so the 4x4 is good to have if you only wish to only run upto a greys conversion and easy to get hold of...the eec4 is best but quite expensive and hard to get hold of....but if you wanting around 500bhp you need it!