bobcat06 Posted July 11, 2010 Share Posted July 11, 2010 I just got a 07 IS 250 and just want to see what upgrades I can do to have the best performance on speed. Best bang for the buck. Quote Link to comment Share on other sites More sharing options...
Bellman Posted August 3, 2010 Share Posted August 3, 2010 F-Sport options are available now from Lexus as dealer installed or over the counter options and will not compromise your warranty. The sport tuned exhaust sounds great and allows for some reduction in resistance and a minor increase in horsepower. The sway-bars, Bilstein shocks and lowering springs have a huge effect on stiffness & cornering . There are other brake/suspension combinations that are quite noticeable, but unless you have the 3.5 ltr engine they're probably wasted. Quote Link to comment Share on other sites More sharing options...
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