Bosch double iridium spark plugs 96337 — Pack of 4, fine-wire laser-welded for GDI engines

BOSCH 96337 Double Iridium spark plugs are fine-wire, laser-welded OE-style plugs designed to improve ignitability and longevity for modern gasoline engines.

These Bosch OE fine-wire double iridium plugs combine an ultra-fine iridium center electrode with an iridium ground electrode inlay and a laser-welded tapered design to deliver consistent sparks, extended service life, and reliable fitment for many contemporary gasoline engines — including those with Gasoline Direct Injection (GDI). Factory pre-gapped and nickel-plated for corrosion resistance, they arrive ready to install and are engineered to meet original equipment fit, form, and function.

How do these spark plugs improve engine starting and responsiveness?

The ultra-fine wire iridium firing pin and 360-degree laser weld lower the voltage required to produce a consistent spark, helping ignition at lower energy levels and supporting smoother starts and throttle response. Better ignitability can translate to more complete combustion under a range of operating conditions.

• Fine-wire iridium center reduces voltage demand up to ~24%.
• Laser-welded tip maintains consistent spark geometry over time.
• Double iridium inlay increases durability versus standard plugs.

Will these plugs fit my vehicle and need special setup before installation?

BOSCH 96337 plugs are OE-matched for fit and spark position, making them compatible with many modern gasoline engines, including several Jeep, Ram, and Volkswagen models. They come pre-gapped at the factory, so no gap adjustment is required before installation in most applications.

• OE spark position matched for GDI engines and other modern designs.
• Pre-gapped out of the box — ready for installation.
• Nickel-plated rolled threads resist corrosion and eliminate anti-seize need.

How do these plugs hold up over time and during service?

The double iridium construction and laser-welded electrode resist wear, helping maintain consistent spark performance for longer intervals than conventional plugs. Corrosion-resistant plating on the threads reduces the risk of galling, making removal at service time simpler and safer for the cylinder head.

• Iridium electrodes extend service life compared to copper or platinum plugs.
• Rolled, nickel-plated threads resist corrosion and seize-up.
• Durable weld and materials keep electrode geometry stable across miles.

Are there any installation tips or things to avoid?

Because these plugs are pre-gapped and thread-plated, installation is straightforward: use correct torque, avoid cross-threading, and do not add anti-seize to the plated threads. Follow your vehicle manufacturer’s torque specs and replace in matched sets where recommended for consistent performance.

• Install using manufacturer torque specs; avoid over-tightening.
• Do not apply anti-seize to nickel-plated rolled threads.
• Replace plugs in the engine’s recommended interval or when symptoms indicate deterioration.

Who is this for: The BOSCH 96337 Double Iridium Pack of 4 is aimed at owners and technicians who want an OE-grade replacement that balances improved ignitability and longevity without modifying ignition components. Ideal for drivers of compatible Jeep, Ram, and Volkswagen models and for anyone maintaining modern gasoline or GDI engines who prefers factory-style fitment, ready-to-install plugs, and corrosion-resistant threads for easier service.