I was looking for places that sells a HRC jet kit for my MC28 and came across http://www.apexleisure.co.uk/nsr.htm. They have the jet kit (part# 16020-NKD-970) for about $130usd (or $155usd w/ 2 of the emulsion tubes) while Tyga has them for $208usd (part #16020-NKD-651).

Whats the difference between the two besides big price difference? Why is the part# different? What else would I need besides the jet kit?
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1994 NSR250SE