the N1 pump is a standard pump just with an uprated spring but your still pay £200 + for one ,JUN developed High flow oil pumps for the engine which may become lack of oil quantity when high revolution. With a tuning engine overusing high revolution, lack of oil becomes a serious problem. We designed new gears in the oil pumps to increase flowing oil quantity. Use our oil pump before the trouble occurred around turbines or crank. Good insurance IMO & worth the extra £££ for Peace of mind
the N1 oil pump has better quailty rotors and a slightly higher flow rate! and a thicker back plate not just a stronger sping.
having said all that i fitted a trust pump and put the n1 on the shelf(and its in perfect order).