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This AN6 fuel filter and regulator adds reliability and reduces cost with -6 AN inlet outlet and return fittings built into the assembly Designed specifically for LS swaps or EFI conversions that require a reliable and professional fuel system solution 58 PSI fuel pressure regulator is integrated into the filter and works well with modern fuel injected engines such as LS Hemi and more Eliminates adapter fittings and includes a mounting bracket with rubber insulator to make installation a breeze Five micron fuel filter is built into the assembly to protect your injectors and ensure a long service life Integrated AN6 inlet outlet and return fittings for use with AN6 fuel lines. Shorter return line requirement reduces amount of overall fuel line needed. Built in 58psi regulator for all LS and Hemi swaps and most aftermarket EFI systems. Utilizes 5 micron filter media to protect your expensive fuel injectors. Includes mounting bracket with ground strap and rubber insulator for quiet operation. No need for AN adapters that create additional potential fuel system leak points. Lower cost alternative than using a stock GM filter with AN adapter fittings. Works with in-tank or externally mounted EFI fuel pumps. No need for standalone regulator or pressure gauge and the extra fittings they need. Fully welded steel housing and fittings with paper filter element. Supports up to 450hp naturally aspirated applications. Filter bracket features 3/8-inch mounting hole mounting fastener not included Our 2-in-1 LS Fuel Filter Regulator Is the Perfect Solution to Your LS Swap Fuel System Needs Plumbing an EFI fuel system is quite a bit different than the carbureted fuel systems found on our favorite hot rods muscle cars and classic trucks. The single 5/16-inch steel line mechanical fuel pump and screw in fuel filter at the carb will flat out not cut it when youre either adding aftermarket EFI to your vehicles current engine or swapping in something like the popular LS engine or modern Hemi. From the fuel pump to the fuel line everything must be upgraded to handle the higher volume and pressures that are involved with electronic fuel injection. Two critical aspects of an EFI fuel system are the higher filtration requirement and the need to regulate the electric fuel pumps pressure. Most EFI systems utilize between a 5 and 10 micron post filter meaning after the pump to protect the sensitive and fine internals of the fuel injectors themselves. A fuel pressure regulator is sometimes used in a carbureted application but it is mandatory with EFI