I purchased my RX7 bone stock in November of 1998.  Over the past year I've made a few modifications enhancing the performance of this vehicle.  With these modifications  I've bumped the stock 255 BHP to over 400 BHP.  This  is based on the 343 RWHP I recorded on a Dynojet dynanometer.  With a 15% driveline loss, 343 RWHP = 404 BHP.  

On each page of performance products, I've listed approximate horse power gains that can be expected with the addition of that particular modification.  These performance gains are estimated and in some cases may be based on manufacturers claims or just  hearsay.  I have not dyno tested any of these products myself, so your results, as well as opinions, with these modifications may vary.