SPOOLOGIC L5P Exhaust Up-Pipe Bolt Kit

The SPOOLOGIC SL-320-035 Exhaust Up-Pipe Bolt Kit supplies up-pipe hardware built to the latest GM bolt specification for compatible 6.6L Duramax L5P exhaust components.

Features

• 13 mm, 6-point hex bolt heads
• Washers included

What's Included

• 12 SPOOLOGIC Up-Pipe Bolts
• 12 SPOOLOGIC Washers

Fitment

• 2017–2026 Chevrolet Silverado GMC Sierra 2500 3500 — 6.6L Duramax L5P

Compatibility Note

⚠️ Match the bolts to the threaded exhaust components. GM specifies standard bolts for updated 30-degree ramp-angle threads; original Powerlok components require the matching Powerlok bolts.

1-Year Limited Warranty

Every SPOOLOGIC bolt kit is covered by a 1-Year Limited Warranty against defects in materials and workmanship from the date of purchase. Warranty coverage requires that the failed hardware first be shipped back to SPOOLOGIC for inspection. If SPOOLOGIC determines the failure was caused by a defect in materials or workmanship, the hardware will be replaced at SPOOLOGIC’s discretion. Warranty does not cover damage from improper installation, incorrect torque, over-tightening, cross-threading, reuse of stretched or previously torqued fasteners, exposure to temperatures beyond the fastener’s rated operating range, corrosion from road salt or contaminated environments, use outside the listed fitment, cosmetic wear, or normal heat cycling marks. Warranty does not cover labor, shipping, towing, downtime, broken extractors, or any other costs outside the bolt kit itself. See the SPOOLOGIC Warranty Policy for complete terms.