Installation Time
(approx) 4 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
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Flowtech LS Swap Exhaust Manifolds; Natural Cast (79-04 Mustang)Find parts that fit my vehicle
Item 439071
Our Price
$275.95 set
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Product Information
Features, Description, Q&A, Specs & Installation
Features & Specs
- Multi-Fit - 2.25 In. Outlet
- Cast Iron Construction For Durability And Corrosion Resistance
- Tight Tuck Design For Universal Fit And Clean Traditional Muscle Car Appearance
- Nickel Plated Steel Mating Flanges Included
- 2 Bolt Exit Flange Configuration Matches E-Rod Exhaust Manifolds For Factory Like Fitment
- 2.25 Inch Outlet Diameter Provides Improved Flow For Maximum Performance
- Main Runner Diameter Of 1.75 In
- M8 X 1.25 X 25mm Bolt Size
- Designed For GM Gen III/IV LS Engines
- Standard Swap Exhaust Manifold Style
- Includes Gasket And Mounting Hardware
- No Oxygen Sensor Port
- Natural Cast Finish
- Grade Type: Performance
- Port Shape: Round
- Mounting Hole Quantity: 6
- Heat Shield Not Included
- Compatible With 79-04 Mustang LS Swap Applications
| Brand | Flowtech |
| Header Type | Shorty Headers |
| Header Primary Size | 2.01-2.25 Inch |
| Header Collector Size | Stock Replacement |
| Header Finish | Raw |
Description
Engine Swap Solution. The Flowtech LS Swap Exhaust Manifolds in natural cast finish provide a robust exhaust routing option for modern LS engine swaps into vintage or classic vehicles. These manifolds are engineered to facilitate improved exhaust flow while maintaining a close tuck to the engine block for clearance and aesthetics.
Construction and Appearance. Manufactured from Hi-Silicon-Moly ductile cast iron, these manifolds offer durability and excellent corrosion resistance. The natural cast finish delivers a traditional look with less under-hood noise compared to typical headers and supports longer leak-free performance.
Installation. Installation includes mounting hardware and factory-compatible flanges for straightforward setup. The tight tuck design promotes universal fitment on most popular chassis, though some vehicle-specific adaptation may be required.
Application. This product is compatible with LS swap applications in 1979–2004 Mustang vehicles, providing a fitment solution tailored for these model years and LS engine generations.
Flowtech 11730FLT
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (2) Exhaust Manifolds
- Gaskets and Hardware
- Instruction Manual
4.3
Reviews of Flowtech Exhaust Products (42)
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