fuel pumps are mitsubishi. no real upgrade needed, they all pump lots of fuel and same pressure. just look for best price. ill search for mitsubishi part number, once knew but now forgotten. lancer etc are same or similar. place i worked at once, fuel components retailer, we imported tridon brand from canada, 13 bucks each. re boxed, sold as genuine for many brands. re boxed as high performance nissan skyline pump, retail just under a grand. its all a big rip off, electric fuel pumps work very well, each one could fuel 10 gsx 14. as for which country makes the best, good luck. our tridon were made in china, shipped to canada, then distributed worldwide.