SPELAB Exhaust Header for 1998-2014 LS1/LS2/LS3/LS4/LS6, LSX V8 Engines

LS-Family Headers with Application-Specific Fit Checks

The SPELAB polished stainless steel header pair is intended for configuration-checked LS-family V8 exhaust projects. The advertised engine range names LS1, LS2, LS3, LS4, LS6 and LSX within 1998–2014, but those references do not confirm installation in every chassis. Transverse front-wheel-drive LS4 applications require explicit fitment confirmation before purchase.

Best For

• LS builders who can verify the head flange and installed engine position.
• Custom exhaust projects with measured collector connections and surrounding clearance.
• Owners seeking a header pair with connection accessories after confirming their exact application.

Collector Layout and Exhaust Planning

The SPELAB LS-family pair uses four runners into one collector on each bank. Flow and sound changes depend on the engine, collector connections and downstream exhaust.

No verified product-specific dyno result or dimensioned fitment drawing establishes a fixed gain or universal bolt-on installation. Obtain actual primary, collector and flange measurements before committing to a custom exhaust route.

Specs

What’s Included

Check the Installation section for vehicle-side seals, fasteners and connections that may need to be retained or renewed.

Vehicle & Engine Fitment

A 2009 Chevrolet Impala SS 5.3L FWD application is not confirmed for this header pair. The engine-family reference does not resolve transverse packaging, firewall, transmission or crossover-pipe requirements. Do not order for an LS4 FWD vehicle without a specific application review.

Intended use: establish applicable noise and emissions requirements before purchase. Retain all required catalysts, sensors and auxiliary equipment. Product naming alone does not establish road-use certification or inspection compliance.

Before You Order & Install

• Application: provide the actual engine, cylinder heads, vehicle model, drivetrain orientation and transmission for review.
• Clearance: check the installed engine position, steering, firewall, subframe, starter and transmission before planning the collectors.
• Connections: confirm the mating-ring profile, clamp size, outlet diameter, downstream supports and sensor arrangement.
• Materials and accessories: obtain confirmation of stainless grade and any required vehicle-side parts. Photos do not establish catalyst or sensor inclusion.

Will the ECU Need Tuning?

Have a qualified technician assess the actual engine, sensor arrangement and complete exhaust. Product-specific calibration data does not support a universal claim that tuning is required or unnecessary. Diagnose leaks, sensor faults and warning lights first. Calibration cannot correct incompatible joints, poor clearance or missing required emissions equipment.

Installation Overview

This is a general installation overview. Follow the service procedure for the actual vehicle and complete the configuration and connection checks above. Professional installation is recommended.

1. Confirm the configuration and parts. Confirm the LS-family engine and exact chassis. Resolve transverse LS4 fitment and all collector, sensor and equipment requirements before installation.
2. Cool and support the vehicle. Allow the engine and exhaust to cool completely. Use the correct lifting procedure with a suitable lift or rated stands on a firm level surface; never work beneath a vehicle supported only by a jack.
3. Record connections and remove the original assembly. Record the original pipe and sensor route. Support the exhaust and remove the original parts according to the actual vehicle or conversion service plan.
4. Prepare the joints. Inspect threads, mating surfaces, supports and retained pipes. Address damaged fasteners and clean sealing faces carefully. Match the appropriate seal and hardware to every joint.
5. Trial-fit the complete route. Trial-fit both LS headers and their mating interfaces with the engine in its installed position. Stop if the firewall, steering, subframe or transmission obstructs the intended route.
6. Secure and restore connections. Secure the compatible gaskets, flanges and clamps to the applicable specifications. Restore required equipment and support the downstream pipes without loading the headers.
7. Check sealing and operation. Run the engine in a well-ventilated area and inspect for leaks, contact, abnormal sound and warning lights. Investigate faults before use and recheck the cooled assembly as required by the applicable service procedure.

Frequently Asked Questions

Will these headers fit a 2009 Impala SS 5.3L FWD?

Fitment of this SPELAB header pair on a 2009 Chevrolet Impala SS 5.3L FWD is not confirmed. The LS4 engine reference does not establish transverse chassis clearance or compatibility with the vehicle’s crossover and downstream exhaust.

Does the LSX label make these headers universal?

The LSX label does not make the SPELAB headers universal. Cylinder-head interfaces, engine position, transmission, steering and collector routing must match the actual vehicle or custom build.

Are these headers verified as 304 stainless steel?

Stainless steel construction is specified for this SPELAB header pair, but the stainless grade requires confirmation. A polished finish does not establish 304 material composition.

Are primary and collector sizes confirmed?

Verified primary and collector dimensions are not available for this SPELAB LS-family header pair. Obtain the required measurements and mating-ring profile before matching downstream pipes or clamps.

What connection parts come with this LS header pair?

The SPELAB package contains two header banks, collector mating rings, gasket strips, connection clamps, bolts and nuts. Confirm the current quantities and any additional vehicle-side seals, sensors, fasteners or supports required for the actual installation.

Warranty & Customer Support

A one-year limited warranty from delivery covers qualifying material and workmanship defects under normal use for the original purchaser. Proof of purchase is required. Improper installation, alteration and modification are excluded, as are installation and removal labor costs.

Returns within 30 days are subject to product condition and the applicable shipping terms. Read the Warranty & Return Policy for eligibility and claim procedures.

For fitment questions or an order issue, email service@spelabautoparts.com or call +1 888 301 8666. Hours: Monday–Friday, 9:00 AM–6:00 PM EDT. Share your vehicle year, model, engine, chosen style and relevant photos; include the order number for an existing purchase.