yep, but i don't think it is a very significant change
if you don't have one for your SRT-4 yet - Get one tommarrow - they are very cheap, and the sound is amazing - can't get enough of it, and makes it even more fun to drive/be in!!!!! (My buddies got one, not me)
no but the manual boost controller was the biggest change.... by bypassing the surge valve and making the wastegate stay open longer its just sweet you just have to be carefull of compressor surge since the turbo will even spool in neutral and reverse now, you also arent limited in first gear
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