i have both the steinbuaer and the beaudesert 2 3/4 zorst would have been happy with just the exhaust but i bought the chip first, i can't say the chip makes a huge amount of difference but the exhaust system really makes a big difference. as for the roo systems package i believe they work with the safety parameters of the engine and if i had my time again i would go with the roo systems match tuned package. hope this is of some help cheers.....
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