Nissan Exhaust Header

An exhaust header replaces the factory exhaust manifold, featuring individually tuned tubes for each cylinder. This design improves exhaust gas flow, reduces backpressure, and can increase horsepower and torque, especially in the mid‑to‑high RPM range.

Aftermarket headers offer:

• Increased horsepower & torque – better flow means more power.
• Improved throttle response – reduced backpressure lets the engine breathe easier.
• Enhanced exhaust note – a deeper, more aggressive sound.
• Potential weight reduction – lighter materials than stock cast‑iron manifolds.

SPELAB headers are typically constructed from quality stainless steel for durability and corrosion resistance. Some models may feature ceramic coating for reduced under‑hood temperatures and a finished appearance. Check individual product descriptions for specific material details.

SPELAB’s current header collection focuses on Nissan cars and older trucks (e.g., Hardbody D21). Headers for modern Nissan Titans or Frontiers may not be listed. Use the website’s search or filter by your specific model to see available options.

While not always required, a tune is highly recommended** to maximize performance gains. Headers change exhaust flow, which can affect air‑fuel ratios. A proper tune ensures optimal power, fuel economy, and prevents check‑engine lights from O2 sensor discrepancies.

They can, especially if the headers relocate or delete catalytic converters. O2 sensor extensions or spacers may be needed to avoid codes. For headers that retain all factory emissions equipment, the risk is lower, but a tune is still the best way to prevent CELs.

Legality varies by location. Headers that **remove catalytic converters are generally **not street‑legal** in emissions‑controlled areas. Headers that are **CARB‑exempt** or designed to work with existing cats are more likely to be compliant. Always check local regulations before purchasing.

Stainless‑steel headers need minimal maintenance:

• Periodically check for exhaust leaks at the flanges.
• Ensure all bolts remain tight (re‑torque after a few heat cycles).
• Clean with a mild stainless‑steel cleaner to maintain appearance.
• Inspect for cracks or warping if performance drops.