[PMD911]

and what's the advantage of having the whole catback for the exhaust instead of just the rear?

 

[nemesiss]

new headers...your crazy...the headers on the IS are pretty dyam good for stock mayn.......
ECLIPSERASER

 

[Risk3233]

There was an indepth thread about the IS300 exhaust and the difficulty in modifying the exhaust. Do a search looking the the lost HP between the GS300 and the IS.

 

[MunkyMan]

Can't you jsut slap on some supra headers? I mean with a little mandrel bending they should be all right. Am i right?

 

[DtEW]

MunkyMan: Yes, but that misses an unspoken point. Even though the Supra header should fit the head, the fact that two catalytic converters are on the present manifold (a manifold is when the "header" is not quite a header) makes this mod instantly street-illegal across 50 states (I think; I'm certain for CA, though). Most people who plop down 30K+ for a semi-luxury car would like to be able to drive it at more than just the track.

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