Achieve a total transformation in gear selection with the MTEC Industries shift spring kit, the definitive upgrade for drivers who demand a crisp, mechanical feel. The factory manual transmission in many Nissan and Infiniti chassis is often criticized for having a vague or heavy sensation that can lead to missed shifts during spirited driving. By replacing the soft or worn OEM components with our heavy-duty shift spring set, you significantly increase the centering tension of the gear lever, resulting in a much tighter and more tactile response. These precision-engineered springs enhance the horizontal gate return, ensuring the shifter snaps back to the neutral position with authority. This improved resistance reduces shifter slop and provides the confidence needed for fast, accurate gear changes on both the street and the track. Manufactured from premium high-tensile spring steel, our shift spring components are built to maintain their effective rate and durability under the most demanding conditions. Vehicle Fitment (Manual Transmission Only): Nissan 400Z Z (2023–2026) Installation is a direct bolt-on process that utilizes factory locations for a seamless drivetrain upgrade. Stop settling for a disconnected driving experience and enjoy the precision of a bolt-action feel with the MTEC Industries shift spring kit.