Long Exhaust Header For GMC Sierra (2014-2018) with 5.3L 6.2L V8 Engine

Uncork the massive potential of your GM V8 truck and eliminate the flow restriction of the factory log manifolds with this high-flow long tube header and Y-pipe system.

Stainless Steel Long Tube Headers & Y-Pipe for Cadillac, Chevy, & GMC Trucks (1-7/8" Primaries)

If you are driving a modern GM truck or SUV—whether it’s the workhorse Silverado/Sierra or the luxury Escalade/Yukon—you are sitting behind a potent V8 engine that is desperately trying to exhale. From the factory, these trucks come equipped with cast iron "log" manifolds designed for quiet operation and rapid manufacturing, not performance. These stock manifolds trap heat, create backpressure, and force your engine to work harder to push exhaust gases out. This stainless steel header package is the ultimate solution to let your LS or LT-based engine breathe freely.

Featuring massive 1.875" (1-7/8") primary tubes, this kit is sized perfectly for the 5.3L and 6.2L V8s. Unlike smaller 1-5/8" headers that can choke top-end power, the 1-7/8" diameter allows for maximum scavenging at high RPMs without sacrificing low-end torque. This is critical for getting heavy trucks moving or towing loads. The included Y-Pipe connects the headers to your exhaust system, ensuring a smooth, laminar flow from the cylinder heads all the way back.

Durability is key when upgrading exhaust components on a truck. Constructed from stainless steel with substantial 7/16" head flanges, these headers are built to resist warping—a common issue with thinner, cheaper alternatives. The flattening process on the flanges ensures a tight seal against the cylinder head, preventing those annoying exhaust ticks. Whether you are chasing more horsepower on the dyno, a louder, chop-heavy idle, or simply replacing cracked manifolds, this kit delivers the performance and sound your truck deserves.

Why You Need This Upgrade

• Maximum Flow: Large 1.875" (1-7/8") primary tubes reduce backpressure, allowing the engine to scavenge exhaust gases efficiently for big power gains.
• Complete Solution: Includes a matching Y-Pipe to bridge the headers to your exhaust system, eliminating the need for expensive custom fabrication.
• Leak-Free Seal: Heavy-duty 7/16" thick head flanges and 3/8" outlet flanges prevent warping and gasket blowouts under high heat.
• Aggressive Sound: dramatically changes the tone of your V8, turning the muffled stock whisper into a deep, aggressive American V8 roar.
• Stainless Durability: Stainless steel construction withstands the elements and high exhaust temperatures far better than mild steel or cast iron.

Installation Notes

Professional Installation Recommended: Installing long tube headers on 4WD/AWD trucks can be a tight fit, often requiring manipulation around the steering shaft and front driveshaft. No instructions are included in the box. This kit includes the necessary gaskets, exhaust clamps, and head bolts. Note: Due to the change in catalytic converter location and oxygen sensor placement, a professional ECU tune is highly recommended after installation to maximize power gains and manage check engine lights.

Replaces These OEM Applications

• Cadillac Escalade 2015, 2016, 2017 2WD/4WD
• Chevy Silverado 1500/2500/3500 2014, 2015, 2016, 2017 2WD/4WD (except 2014 Chevrolet Silverado 1500 LT Crew Cab Pickup 4-Door 5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated)
• Chevy Suburban 1500/2500 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 2WD/4WD
• Chevy Tahoe 2015, 2016, 2017 2WD/4WD
• GMC Sierra 1500 2014, 2015, 2016, 2017 2WD/4WD
• GMC Yukon 2015, 2016, 2017 2WD/4WD

Exclusions: Exclude Mid-Year Change 2018.5+ New Body Style

Transform your truck from a restricted daily driver into a high-performance machine—order your Stainless Header and Y-Pipe Kit today.