Spelab

3.5-Inch High-Flow Turbo Downpipe Exhaust

$228.00

SKU: SPES08074-IS08196S

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Spelab 3.5-Inch High-Flow Turbo Downpipe Exhaust is engineered to optimize performance by replacing the restrictive factory downpipe on turbocharged vehicles. Its large 3.5-inch diameter design promotes dramatically increased exhaust flow, which helps reduce turbo lag and enhance throttle response. This improved flow minimizes backpressure, allowing the turbocharger to spin faster, produce more boost, and ultimately generate more power. It directly replaces the OEM unit, addressing the performance bottleneck created by the factory downpipe and providing a solid foundation for further performance modifications such as tuning and increased boost levels. This downpipe is specifically designed for 2017-2025 Chevrolet Silverado & GMC Sierra 2500 & 3500HD models equipped with the 6.6L Duramax engine. It will not fit Cab & Chassis trucks. Installation may require removing the turbo. Review customer feedback for installation tips, such as wearing gloves when handling heat wrap.

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

BrandSpelab
Part NumberSPES08074-IS08196S
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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