1999-2008 all GM Gen III Gen IV LS series engines Timing Chain Tensioner Drill Template Adapter 551902 Generic GMC Others Interior 1 * Flanged Nuts -

1 * Flanged Nuts - M8

2015-2020 GMC Yukon

Outlet: 2" / Inlet: 3"

For Discovery 1l 1998-2004

1999-2008 all GM Gen III Gen IV LS series engines Timing Chain Tensioner Drill Template Adapter 551902 Generic GMC Others Interior 1 * Flanged Nuts -Feature: LS Gen 3 Iron Block to Gen 4 Timing Chain Tensioner Drill Template Tool Adapter Billet Aluminum LQ4 LQ9 LM7 LR4 L59 Gen III Gen IV 551902 TL01 Drill Guide for LS Gen III Engines Compatible with all GM Gen III LS series engines from 1999 2008 Used To Add The Nessecary Mounting Holes In Your Engine Block To Mount A Gen Iv Style Timing Chain Guide (Gm #12626407) ONLY compatable with Gen III LS Iron Blocks (LM7, LR4, LQ4, L59, LQ9) Specifics: