Industrial Injection GM Remanufactured Injector For 2004.5-2005 6.6L LLY Duramax 29LPM - 0986435504SE-R4The Industrial Injection 50 percent over Race 4 Injectors have been extrude honed and balanced to a perfect matching set injectors that flow 29 LPM. The Race 4 50 percent over injectors can be run with a stock turbo but one of our Phatshaft turbos or our compound turbo setups is highly recommended to help reduce EGTs. We balance the injectors to a tighter tolerance than the original manufacturer and have put a lot of time into making these the best