Exhaust› Headers, Manifolds and Components

Flashark

Long Tube Exhaust Headers for 5.0L/5.7L Small Block Chevy V8

$299.99

SKU: FLES08255

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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Flashark long tube exhaust headers are designed for 1988-1997 Chevrolet and GMC C/K trucks, Tahoe, and Blazer models equipped with a 5.0L 305 or 5.7L 350 small block Chevy V8 engine. Constructed from T304 stainless steel with a mirror-polished finish, these headers feature 1.5-inch primary tubes and 3-inch collectors with a 3-bolt flange. They offer a cleaner exhaust path and a deeper V8 tone compared to restrictive factory manifolds.
Show original supplier description
The Flashark FLES08255 is a set of long tube exhaust headers specifically designed for 1988-1997 Chevrolet and GMC C/K series trucks, including the 1500, 2500, Tahoe, and Blazer models. These headers are engineered to be compatible with 5.0L 305 and 5.7L 350 small block Chevy V8 engines, supporting both Vortec and TBI engine configurations. This kit includes the necessary hardware for installation, such as reducers, bolts, and metal gaskets. The headers feature 3.0-inch outlets with 3-bolt collector flanges. Fitment requires careful confirmation of your vehicle's year, model, engine size, and drivetrain. Specifically, the C-series trucks are for 2WD applications, while K-series trucks are for 4WD applications. For K-series vehicles, extra clearance checks around the front driveline, frame, and collector area may be necessary. For 1996 5.7 Vortec trucks, it is recommended to confirm chassis layout, O2 sensor position, and exhaust routing. Trucks from 1998 and newer are not explicitly listed and may not fit without verification of the exact model, engine, chassis, and exhaust layout. Engine-swapped or heavily modified trucks should also be verified for compatibility before ordering. Professional installation is recommended, and some users have suggested replacing OEM bolts and gaskets with new ones for optimal results. A tune may be required for optimal performance and to prevent issues like boost wandering.
Vehicle Symptoms
  • Loud ticking noise from exhaust under acceleration
  • Check engine light on with poor fuel economy
  • Rough idle especially when cold
  • Loss of low-end torque and sluggish acceleration
Diagnostic Codes
  • P0171 – System too lean (Bank 1)
  • P0174 – System too lean (Bank 2)
  • P0420 – Catalyst efficiency below threshold (Bank 1)
  • P0430 – Catalyst efficiency below threshold (Bank 2)
  • P0300 – Random/multiple cylinder misfire detected
Relevant Conversations
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  • P0420 caused by exhaust leak? Replace headers?
  • Best long tube headers for 5.7L Vortec
  • Flashark headers vs Hooker vs Flowtech
  • How to install long tube headers on 88-98 Chevy truck
  • Will long tube headers fix P0171?
  • Long tube headers for 305 TBI truck
  • Headers that reduce exhaust restriction increase mpg
  • Pairing long tube headers with high flow cats
  • Exhaust manifold replacement cost vs 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.

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Specifications

BrandFlashark
Part NumberFLES08255
CategoryExhaust
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