If you wanna go crazy with weight reduction it's probably just best to get the weight down on things that are relatively heavy. Wheels, lower profile tyres, bonnet, mirrors, seats..
Sweet Ronan! 195's on the back I'm guessing? Can you go lower on the back or will the arches need a roll? Would you say these could be used on the car whilst on track, as the body will dip and roll a bit. Still in two minds whether or not to go for them..
You mentioned a track Civic earlier..I think you just need to go balls out on this! Check this EP82 ;) http://www.ukstarletowners.com/topic/64453-dat-silver-track-slag-gt/#entry827373
Found more pics on his build! Track times at Tskuba compared to other cars, pretty impressive! http://www.clever-racing.com/tcsa/08SA2000/081019/20081019res.htm
"Tsukuba Circuit is a specification engine 4E normal turbine K1-200V Ricoh racing exhaust manifold Blitz intercooler (R Performance Specifications) 3 92 seconds 1 minute TC2000 BEST (2011.2.6) TC1000 BEST 41 seconds 7"