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Originally Posted by G22DET
you wont get that much HP off a factory header...
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not true buddy....
I have 2 nissans.
1) 92 SER upgraded to a JDM SR20DE with all the trimmings.
2) 95 200SX SER stock.
I install the jap spec motor with computer (its different) and header (its bigger than the U.S version).. and let me tell you that its NIGHT AND DAY.
the motors are not the same. I needed valve seals from the 300Z to replace the one that got damaged on the jap motor and all the parts from the U.S head gasket kit would not work. The valves are bigger the injectors push a little more fuel. To truely tell the difference you MUST use the Jap computer and header. TRUST ME
So you will see a performance difference BUT not until up put KEVLAR on your STOCK CLUTCH ( after market clutches WILL break as you get heavy on HP and they dont fit as well as the Stock Clutch - this is not a Honda, so there is not need for 3 puck or clutches with out springs - When you replace your clutch, just find a Clutch Shop put Kevlar/Cevlar on it. Your clutch will never break or slip again - recommended for turbo apps unless your going to do some WELDING ) im in Miami /Ft Lauderdale Florida...we have ALOT of SR20's ( imported turbos etc.....its like a swarm of locusts )