Holley Needle & Seat - Titanium Needle and Seat Assembly (.150" Seat) 4X-Large An integral LED eases timing

An integral LED eases timing calibration and diagnostics

Aluminum shields protect body panels from exhaust exiting through the passenger door and provide a clean

2-5/8 in Spindle Nuts

at a budget price

Holley Needle & Seat - Titanium Needle and Seat Assembly (.150" Seat) 4X-Large An integral LED eases timingWith a . 150" seat, this needle and seat assembly is about as big as you can get. What's really tricky, though, is that the needle is made of titanium! This needle design is very responsive to changes in flow rates and has excellent sealing capabilities. 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