Wiring
4 articles
Diagnostics
22 articles
Tuning
7 articles
Engine
12 articles
Turbochargers
6 articles
Product Instructions
Battery Cable Kit Instructions
See attached PDF File
Blue Ribbon Oil Cooler Kit Instructions
Blue Ribbon Oil Cooler & Hose Upgrade Kit The Blue Ribbon upgrade kit features an improved oil cooler and stainless steel braided lines. These upgrade...
Remote Fuel Filter Kit for 6.5L Chevy/GM
This document serves as the installation instructions for the RFFK - Remote Fuel Filter Kit 2x M8 x 30mm Set Screws 2x M8 Flange Nuts 2x ⅜" x 1" Hex H...
DB2 Throttle Cable Instructions
start off with buying one of Quadstar Tunings NEW throttle cables! https://quadstartuning.com/products/6-5l-db2-throttle-cable Remove the clip that ...
Glow Plug Harness Instructions
This article provides step-by-step instructions for installing the Quadstar Tuning 6.5 Turbo Diesel Glow Plug Harness. This installation typically tak...
Glow Plug Heat Shields
Quadstar's stainless glow plug heat shields are made to be upgraded versions of the stock fitment. This means they are built to fit the stock exhaust ...
Proven Builds
DB2 350 Wheel Horsepower Build - Banghart Diesel
4/9/2025 Banghart Diesel Performance contacted us early in 2025 about a customer's build they had planned. It started off as a plan to refresh the or...
DS4 Beast Pump Build - Banghart Diesel
This article is a work in progress, we'll detail the full build list and content as soon as we can. The Banghart Diesel Performance 1995 Shop truck ...
Miscellaneous
Accessory Drive Brackets and Belt Routing
This article is a work in progress that we started to cover important information about various accessory drive setups on 6.2 and 6.5L diesel engines ...
Factory Fuel Filter FFM Removal
A common question we get is if you are able to complexly remove (delete) the factory Fuel Filter Manger (FFM). The answer is, YES. We do it frequently...
Injection Pump Hard Line Routing
This document shows the correct routing for both DB2 and DS4 injection pump hard fuel lines for all 6.2 and 6.5L diesel engines. The firing order on t...
DS4 to DB2 Conversion Guide
Giving credit to the original author, we have attached the original Bobbie Martin DB2 conversion guide to this article. However, many things have chan...
6.5L Alternator Pulley Size
This is important because the tachometer signal comes from the alternator on all 6.5L diesel trucks. If the pulley size is wrong, then the tachometer...
Recommended Fuel Pressure
Lift Pump functionality is a CRITICAL part of the fuel system on any diesel vehicle. The 6.5L is no exception. There are different requirements depend...
DS4 Part Number Cross References
1994-2002 GM Trucks, Suburbans, Vans, Hummers, and some later model Hummers as well. DS4831-5288, 5459, 5521, 5521S, 5521WE, 5942 These are all supers...
RPO Codes
These are 3 digit identification numbers that will tell you the factory build options of your GM vehicle There is a sticker on the inside of the glove...
DS4 Injection pump replacement
This document provides a comprehensive guide for the replacement of the Stanadyne DS4 electronic injection pump commonly used in 1994 and later 6.5L d...
You just bought your first 6.5what to do FIRST
In the pursuit of enhancing vehicle performance, it is crucial to prioritize reliability modifications before increasing fuel delivery. This article o...
Looking to buy your first 6.5 here is what you need to know!
This document provides a comprehensive overview of frequently asked questions regarding the purchase and maintenance of a 6.5L Diesel engine. It cover...
6.5 Torque specs
This document provides a comprehensive list of torque specifications for various components of the 6.5TD engine. Proper torque settings are crucial fo...