Holley Fuel Rail Kit - For HLY300-137 356603 May not fit 2005-2006 models

May not fit 2005-2006 models with a body lift

Fits virtually all makes and models of 4 bbl square and spread bore carburetors

Competition Engineering has designed a single wheel Wheel-E-Bar™ kit that is perfect for both the professional and amateur chassis builder

very rough idle

Holley Fuel Rail Kit - For HLY300-137 356603 May not fit 2005-2006 modelsEFI Fuel Rail Kit for HLY300 137 Single Plane MidRise EFI LS Intake Manifold which fits all GM LS Gen III or IV engines equipped with LS1 LS2 LS6 style cathedral port cylinder heads. Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR Cup team and nearly every NHRA Pro Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley