i have been looking for performance parts for my 87 crx and was wondering if i can use 2nd gen parts for a 1st gen.

it's one of those thing you will have to test and see. this (http://www.redpepperracing.com/forums/index.php?showtopic=7788&view=findpost&p=68644) guy used a 2G Acura intake on his 1G crx with a B18A1 engine swap and said it mite fit a stock crx motor

try these's websites for performance parts www.nopi.com www.grounddynamics.com www.andyautosports.com but as far as i know the body designs are different as in width and height. but as motor parts totally different trust me i tried.