Installation Time
(approx) 2 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; Black Ceramic (79-04 Mustang)Find parts that fit my vehicle
Item 439073
Our Price
$382.95 pair
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$19.15 Available in AM Cash Rewards.
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Product Information
Features, Description, Q&A, Specs & Installation
Features & Specs
- Flowtech Cast Iron Exhaust Manifolds Have A 2.25 Inch Outlet
- Designed To Hug Close To Engine Block For Wide Variety Of Replacement And Engine-Swap Applications At Budget Friendly Price
- Provide Years Of Leak-Free Performance With Less Under Hood Noise Than Traditional Headers
- Shorty Design Allows Routing Exhaust Tubing Close To Frame/Floor Pan For Maximum Ground Clearance
- Intended For GM Gen III/IV LS Engine Swap Applications Where Durability And Leak-Free Sealing Is Desired
- Nickel Plated Steel Mating Flanges Included
- 2.25 Inch Outlet Diameter Offers Improved Flow For Maximum Performance From Cast Iron Manifold
- 2 Bolt Exit Flange Configuration Matches E-Rod Exhaust Manifolds For Factory-Like Fitment
- Allows Use Of Factory Gaskets And Fasteners For OE Quality Seal And Fitment To Emissions Devices
- Cast From Hi-Silicon-Moly Ductile Iron For Durability And Corrosion Resistance
- Tight Tuck Design Provides Universal Fit For Most Popular Chassis And Traditional Muscle Car Appearance
- Available In Black Ceramic Coating For Reduced Engine Compartment Temps And Improved Corrosion Resistance
- Application Multi-Fit
- Bolt Size M8 X 1.25 X 25mm
- Collector Diameter 2.25 IN
- Emission Code 8
- Engine GM Gen III/IV LS
- Exhaust Manifold Style Standard Swap
- Finish Black Ceramic
- Main Piping Diameter 1-3/4 IN
- Material Cast Iron
- Subframe Stock
- Tube Material Cast Iron
- Fits 79-04 Mustang
| Brand | Flowtech |
| Header Type | Shorty Headers |
| Header Primary Size | 2.01-2.25 Inch |
| Header Collector Size | Stock Replacement |
| Header Finish | Ceramic Coated |
Description
Premium LS Exhaust Solution. The Flowtech LS Swap Exhaust Manifolds Black Ceramic provide a reliable and efficient exhaust path designed specifically for LS engine swaps. These manifolds are engineered to deliver leak-free operation and enhanced performance by improving exhaust flow while maintaining compatibility with a wide range of vehicles.
Construction and Appearance. Crafted from Hi-Silicon-Moly Ductile Iron, these cast iron manifolds ensure exceptional durability and corrosion resistance. The black ceramic finish reduces engine bay temperatures and further protects against corrosion, while the tight tuck design offers a classic muscle car look and maximizes ground clearance.
Installation. Designed to fit most popular chassis and intended for GM Gen III/IV LS engine swap applications, these manifolds bolt directly to the engine without requiring modifications such as drilling. They include nickel-plated steel mating flanges for added compatibility with OEM-style exhaust components.
Application. Fits 79-04 Mustang and other popular chassis as a multi-fit solution for LS swaps.
Flowtech 31730-3FLT
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
- (2) Nickel-Plated Steel Mating Flanges
4.3
Reviews of Flowtech Exhaust Products (42)
Questions & Answers
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