OMG i read this post today and i'm never going back. i took the stock air box off my '92 RM sedan and zip tied the filter in place. and drove it today and WOW. the car is a completely different animal now. my dual exhaust is much more aggressive, especially at WOT. and on the e-way there are no more quick upshift when i mash it to downshift. thank you for this post. oh, and besides the car now running rich are there any serious implications? thanks again.