Stainless Works 2011-14 Shelby GT500 Headers 1-7/8in Primaries High-Flow Cats 3in H-Pipe (part # GT115HCATHP), built from 304 stainless steel by Stainless Works in Streetsboro, Ohio.
304 Stainless Steel
TIG Welded
2007–14 Shelby GT500
Long Tube Headers
3" Collector
Made in USA
Overview
Improve the sound and performance of your 2007–14 Shelby GT500 with premium long tube headers from Stainless Works. American-Made and designed specifically for the 5.4L or 5.8L Trinity engine, these headers feature 1-7/8" primary tubes that are CNC mandrel bent to increase airflow and engineered to create maximum power.
Each system includes 3" slip-fit collectors with merge spikes, high-flow catalytic converters, and lead pipes that merge into your choice of H-pipe or X-pipe crossover for easy connection to your Stainless Works catback or factory exhaust system.
Built from corrosion-resistant 304 stainless steel with 3/8" thick flanges and oval exhaust ports that are an exact match to the factory cylinder head. Fully TIG welded for strength and durability at our state-of-the-art facility in Streetsboro, Ohio — engineered for long-term performance.
Why Stainless Works
- American-made from raw material to finished product
- TIG welded by skilled craftsmen for strength and beauty
- Lifetime warranty on material and craftsmanship
- Direct bolt-on fit for 2007–14 Shelby GT500
- Multiple connection options to match your build
Key Features
1-7/8" Primary Tubes
Optimized sizing for strong mid-range and top-end power gains.
3" Slip-Fit Collectors
Merge spikes improve exhaust scavenging for maximum performance.
High-Flow Catalytic Converters
EPA compliance with improved flow for maximum power.
H-Pipe or X-Pipe Crossover
Choose your preferred crossover for optimal flow and tone.
Mandrel Bent Tubing
Smooth airflow with zero restriction bends.
TIG Welded Construction
Precision welds for maximum durability.
Specifications
| Vehicle Fitment |
2007–14 Shelby GT500 5.4L / 5.8L |
| System Type |
Long Tube Header Kit |
| Primary Tube Size |
1-7/8" |
| Collector Size |
3" Slip-Fit with Merge Spikes |
| Catalytic Converters |
EPA Compliant High-Flow |
| Crossover |
H-Pipe or X-Pipe |
| Connection |
Factory Connection Point Fits 2011 - 14 Only - Fits Stainless Works 2007 - 14 and most Aftermarket Exhausts |
| Flange Thickness |
3/8" |
| Exhaust Ports |
Oval — Exact Match to Factory Cylinder Head |
| Material |
304 Stainless Steel |
| Welding |
TIG Welded |
| Warranty |
Lifetime |
| Origin |
Made in USA — Streetsboro, Ohio |
⇩ Download Installation Instructions (PDF)
See It In Action
Sound Comparison and Features — 2007–14 Shelby GT500 Long Tube Header System
What's In The Box
- Driver & Passenger Side Headers
- Catalytic Converters x2
- X-Pipe or H-Pipe x1
- Clamps x4
- O2 Extensions x2
- Bolt Kit — 16 Pieces
- RTV Tube
- Installation Instructions
Frequently Asked Questions
Will these headers fit my 2007–14 Shelby GT500?
Yes. These long tube headers are designed specifically for the 2007–2014 Shelby GT500 with the 5.4L or 5.8L engine. They are a direct bolt-on kit with no cutting or modification required.
What primary tube size is available?
These headers feature 1-7/8" primary tubes with 3" slip-fit collectors and merge spikes for improved exhaust scavenging and performance.
Can I choose between H-pipe and X-pipe?
Yes. This system is available with your choice of H-pipe or X-pipe crossover to match your preferred sound and performance characteristics.
What warranty is included?
Stainless Works provides a lifetime warranty on material and craftsmanship — covering the full life of the product, not just a limited term.
Questions? Call us at | Mon–Fri 7:30am–4:30pm EST
Built To Order in 4 Weeks — Free Shipping on Orders $50+
This Listing
- Brand: Stainless Works
- Part number: GT115HCATHP
- Product type: Headers
- Fitment: 2011-14 Shelby GT500
- Configuration: H-Pipe, High-Flow Cats, Stock Exhaust (Fits 2011-14 ONLY)
- EPA status: Testing
- Shipping weight: 56 lb
California Prop 65 warning applies to this product.
Emissions note: headers, downpipes and catless/high-flow pipes may not be legal for street use in all states. Check your local emissions laws before installing.
Fitment note: Stainless Works systems are application-specific (year, cab/bed, transmission and factory exhaust). Send us your VIN before ordering and we will confirm fitment: 954-507-6261 or sales@americanmuscleperformance.net.
