Nostrum's LT1 high-pressure fuel pump is a universal HPFP core with a 10.5mm piston and a 250bar operating pressure. This pump is manufactured by Stanadyne Inc and is available for order.

Capable of 250 bar rail pressure sustained operation, this HPFP has a much higher pressure rating than the production GM LT1 and LT4 pump. 

Although a very similar outline to a stock GM LT1 pump , this universal pump has 3/8" SAE quick connect fitting . This pump does not include the accessories and hardware associated with engine installation. For single piece GM LT1 service parts with accessories and hardware, please go to your local GM parts center. 

We also offer Injectors that pair well with this pump and its extra pressure capabilities.

https://lsa-conversion-store.myshopify.com/collections/injectors/products/nostrum-energy-25-over-lt4-injectors