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Exhaust› Headers, Manifolds and Components
Flowtech
Ls Turbo Headers-Natural Finish LS Turbo Headers (Up And Forward) 1-7/8 Inch 409SS Gm 4.8/5.3/6.0L V8 Natural Finish FlowTech
SKU: F00M 11537FLT
Moderate — 2–4 hours
Overview
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Part #: 11537FLT
Flowtech Headers are the perfect combination of quality and value. These "4 to 1" LS Turbo headers available in 1-3/4" and 1-7/8" tube diameters are an ideal design creating a compact package allowing a variety of configurations (Up and Forward, Down and Forward, or Down and Back) to be used as a universal fit Turbo header.
Features:
- CNC Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increases the cylinder scavenging effect and improves engine breathing
- Mandrel Bent Tubes Provide Smooth Flow
- Heavy duty 16-gauge 304SS (Polished Finish Only) and 409SS (Natural, Black Painted, and Ceramic Coated finishes) tubing for increased strength and durability
- Heavy Duty 16 Gauge Tubing For Increased Strength/Durability
- 1-3/4" and 1-7/8" tubing diameters available for increased exhaust flow increasing performance and improved throttle response
- Increased Performance
- 3" collector for maximum strength and exhaust flow
- Improves Throttle Response
- 7/16" thick header flange for a leak-free seal and maximum strength
- Thick Header Flange For Leak Free Seal
- Premium aluminum header gaskets included
- Premium Hardware/Gaskets
- 3" V-Band Flanges and Clamps are included
- V-Band Flanges/Clamps Included
- Available in a total of four finishes (Natural, Black Painted, Ceramic Coated, and Polished)
LS Turbo Headers | Up And Forward | 1.875 in. Primary Tubes w/3 in. Collector | 409 Stainless Steel | Incl. Gaskets | Natural Finish | For Use w/4.8/5.3/6.0L LS Engines w/Turbos
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Vehicle Symptoms
- restricted exhaust flow from stock manifolds
- sluggish turbo spool and noticeable lag
- lack of top-end horsepower under load
- cracked or leaking exhaust manifold
- exhaust tone sounds raspy or restricted
Relevant Conversations
- Flowtech 11537FLT LS turbo headers review
- 1 3/4 vs 1 7/8 turbo headers for LS engine
- 4 to 1 header vs 4 to 2 to 1 for turbo setup
- 409 stainless vs 304 stainless exhaust headers
- best budget LS turbo header kit
- how to install universal fit turbo headers
- Flowtech headers LS swap fitment
- do long tube headers help turbo spool quicker
- turbo header up and forward vs down and back
- what gaskets and bolts needed for new headers
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Flowtech |
| Part Number | F00M 11537FLT |
About MOTORMIA
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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