NGK Audi A4 2009-2005 Direct Fit 5-Wire Wideband A/F Sensor Gunsai K-series engines also feature Fast

K-series engines also feature Fast Ramp and AMAX profile technology

Fragola 1/2 x 3/4 Pipe Reducer Bushing - Black

5in or 3in diameter options and include the Mishimoto Lifetime Warranty

Dual outlet-type BOV

and an 85% boost in internal tube area

NGK Audi A4 2009-2005 Direct Fit 5-Wire Wideband A/F Sensor Gunsai K-series engines also feature FastNTK is the world's largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle's on board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. While conventional switching oxygen sensors only switch rich or lean, wideband oxygen (or Air Fuel Ratio) sensors produce a linear output signal that allows the ECU determine exactly how