"Correct Filter/Regulator Required For Ls1, Ls2, Ls3, Ls7 Swaps Using Returnless Style Fuel Rails And Also Popular When Doing Popular The Tbss/Nnbs Gen Iv Intake Manifold Swap." "Fixed Fuel Pressure Of 58Psi Providing Inline Filtration Between The Fuel Pump And Injector Rail. Both The Feed (From The Tank) And The Return Will Connect To One Side, And The Single Outlet Will Go To The Injector Rail On The Motor." Includes [1] 6An Outlet + [2] 6An Inlet Fittings Which For Simple Plumbing Of Fuel Systems For Ls Swaps And Aftermarket Efi Conversions. Replaces Wix 33737 Gf822 61633737 86737 001834890 1834890 Ff881Dl G11290 G8836 Gf1822 10299146 19239926 Gg299 Gf336 G3737 3737 73737 Pf5493 F55493 640940 644110 644120 "Lifetime Warranty With Dedicated In-House Customer Service Team In The Usa Based In Ventura, California. Quantum Fuel Systems Has Been American-Owned And Operated Since 2009. Se Habla Espa�ol."