FYI, JUN-TW's IS250 is US-spec, because they're in Taiwan, most of those stuffs are made in Taiwan as well or in China.Check out JUN-TW High performance brake linings,BRAKE PADS,BRAKE caliper, brake DISC -- Lexus IS250 power data for the HP numbers on a jdm IS250 with the jun-tw full exhaust. The dyno shows 225 hp. There's another dyno sheet on the site that shows headers and full exhaust at 238 hp.
Go to JUN-TW High performance brake linings,BRAKE PADS,BRAKE caliper, brake DISC -- JUN-TW middle-rear exhaust pipe testing For Lexus IS250 for a sound clip of the dyno test.
Nope, from everything I've seen they're significantly different.Iwas told the cylinder heads are the same.................so should be OK for 250 or 350