Exhaust› Headers, Manifolds and Components

5.3L

201 Stainless Steel Exhaust Header

$399.00

SKU: FLES08203

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Flashark Exhaust Header is designed for 1999-2006 Chevy Avalanche, Suburban, Tahoe, GMC Sierra, and Yukon GMT800 models with 4.8L, 5.3L, and 6.0L V8 engines. Constructed from durable 201 stainless steel with a mirror-polish finish, it improves airflow and reduces back pressure. This header provides each cylinder with its own exhaust pipe to prevent interference, boosting horsepower and engine efficiency.
Show original supplier description
The Flashark Exhaust Header is engineered to enhance the performance of 1999-2006 Chevrolet Avalanche, Suburban, Tahoe, GMC Sierra, and Yukon GMT800 models equipped with 4.8L, 5.3L, or 6.0L V8 engines. By providing each cylinder with an independent exhaust pipe, these long tube headers significantly improve exhaust scavenging compared to restrictive factory manifolds. This design minimizes back pressure, allowing the engine to breathe more freely, particularly in the mid-to-high RPM range, which results in noticeable gains in horsepower and torque. For optimal performance, a professional PCM tune is highly recommended to calibrate for the increased airflow and prevent potential check engine lights. However, due to their extended length, connection to the existing exhaust system will require a matching Y-pipe or custom work at a muffler shop. The kit includes necessary manifold port gaskets and hardware, with anti-seize recommended for bolts during installation. This header is designed to accommodate vehicles with an EGR valve, ensuring emissions compliance for earlier GMT800 models. These headers are engineered to provide clearance for the front driveshaft and differential on 4WD models, ensuring fitment for both 2WD and 4WD configurations. The product fits 1999-2006 Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Avalanche 1500, and 1999-2006 Chevrolet Tahoe and GMC Yukon models with the specified V8 engines.

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

Brand5.3L
Part NumberFLES08203
CategoryExhaust
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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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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