SPELAB Exhaust Header for 2011-2012 FORD Mustang Double-sided

2011–2012 Mustang Double-Sided Header Pair: Verify the Exact Configuration

The SPELAB mirror-polished stainless steel header pair is presented for 2011–2012 Ford Mustang exhaust projects, with exact engine and configuration confirmation required. The pictured double-sided package provides two four-runner header banks with flanged collector connections. Check the actual head pattern, bank routing and downstream interfaces before ordering the pair.

Best For

• Mustang projects needing two matched header banks after the engine application is confirmed.
• Owners comparing a pictured two-bank package with a single-header alternative.
• Complete exhaust planning that matches both collector joints, sensors, required catalysts and existing connecting pipes.

Two Banks with Flanged Collectors

Each SPELAB double-sided Mustang header merges four primary runners into one collector. The pictured collector connections have two mounting holes and projecting round seats; match the corresponding pipe interface and sealing arrangement rather than choosing solely by nominal pipe size.

No product-specific dyno result establishes a guaranteed gain, and the header pair does not establish a complete header-to-rear-exhaust system. Confirm the required connecting pipes and equipment for the actual vehicle.

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

The SPELAB double-sided title and four-runner bank layout do not establish compatibility with every Mustang V8 or identify a specific displacement. Confirm the actual engine and cylinder-head flange; do not extend the advertised year range or assume V6, GT, Boss or Shelby compatibility. The two-bank package also does not prove compatibility with the separate single-header product.

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

• Engine and configuration: obtain product-specific confirmation of the engine, cylinder heads, transmission and both bank routes.
• Collector joints: match the two-hole flanges, projecting seats, bolt spacing and sealing method to the actual connecting pipes. Do not assume a flat outlet gasket is appropriate.
• Package scope: confirm the two-bank set, current gasket and hardware quantities, and any additional pipes, seals or supports required.
• Equipment and clearance: verify sensor positions, required catalysts, steering, starter, air-conditioning lines and ground clearance. No current evidence establishes universal sensor-extension requirements.

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 Mustang year, actual engine, transmission and both cylinder-head patterns. Match the pair’s collector seats and flanges to the required connecting pipes.
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 sensor positions, bank routes and exhaust supports. Support retained pipes and remove the original components using the actual vehicle service procedure.
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. Loosely fit both confirmed header banks and connecting pipes. Check collector engagement, steering travel, transmission, starter, air-conditioning lines and ground clearance.
6. Secure and restore connections. Secure the matched head gaskets, fasteners and correctly sealed collector joints to the applicable specifications. Restore required sensors, catalysts and supports without pipe or wiring strain.
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

What does this double-sided Mustang package contain?

The pictured SPELAB double-sided package contains two four-runner header banks, two four-port head gasket strips and mounting hardware. Confirm current quantities and the exact engine configuration before ordering.

Does double-sided mean this pair fits every Mustang V8?

The SPELAB double-sided designation does not establish universal V8 compatibility or a specific displacement. Confirm the actual engine, head flange, transmission and bank routing for the advertised 2011–2012 Mustang application.

Are these collectors the same as a plain open tube?

The SPELAB double-sided pair has pictured two-hole collector flanges and projecting round seats. Confirm mating geometry, bolt spacing and the appropriate sealing method rather than assuming a plain-tube connection.

Does this set include a complete connecting-pipe and catalyst assembly?

A complete connecting-pipe and catalyst assembly is not established for this SPELAB header pair. Plan compatible downstream components and retain all equipment required for the intended use.

Are oxygen-sensor extensions always required?

Universal oxygen-sensor extension requirements are not established for this SPELAB Mustang pair. Confirm sensor locations and harness reach on the actual configuration; wiring must remain correctly connected and clear of heat and moving parts.

Can the pair guarantee more power without calibration?

This SPELAB Mustang pair has no product-specific evidence supporting a fixed power gain or universal no-tune claim. Verify mechanical compatibility and diagnose leaks, sensor faults or warning lights before considering calibration.

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.