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actually its nowt more than a cheap fast car end of super 1600 is a rally car iprezza wrx sti type ra is a rally car evo gsr etc rally car cup nah its neither
well as the supersprint is designed as a racing system and have gained a large amount with it id say 70 mm is fine lol
oh hong kong erm will see how much it is to ship
dont do a fullfull system for the 172 yet no manifold as standard one is good mine is a one piece decat and mid section and back box 70mm all the way from manifold back
typicall full systems are midsection and back box
or you could just get a cup as aparantly they are much much better than 172s and are stripped out race cars the lot and the colour gives it extra power too but they do require special cup optimax and special cup air in the tyres not to mention the extra special cup water and detergant in the...