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Order processing time is delayed due to extended tax & stimulus refunds. Please email us ahead of time if you are on a specific timeline. Turbos and plenums are made to order and will have additional lead time. As always, we appreciate your support of our small business and look forward to working with you!


NEW ITEMS

Our Featured NEW Items and promotions
OBDI Multi-Position Tuner for 1994-1995

OBDI Multi-Position Tuner for 1994-1995

A Quadstar Tuning exclusive!  Customized to fit the 1994 and 1995 6.5L diesels with a removable chip in the PCM. This is a plug & play unit that holds up to...
OBDII Single Tune for 1996+

OBDII Single Tune for 1996+

For all 1996 and newer 6.5L Turbo diesel vehicles including trucks, vans, cab-chassis, boats, and anything else with a DS4 pump!  This PCM is a sealed unit and requires re-flashing with a...
OBDI Single Tune for 1994-95

OBDI Single Tune for 1994-95

Single replacement PROM chip for 1994 and 1995 6.5L Diesel vehicles. After completing an order, we will provide a comprehensive online form for you to fill out with all vehicle...
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Engine Coolant Temperature Fooler

Engine Coolant Temperature Fooler

For all computer controlled 6.5L turbo diesels, this ECT fooler allows you so quickly and easily perform timing adjustments without having to fully warm up the motor.   Simply disconnect...
Pump Timing Wrench

Pump Timing Wrench

Put the pry bar down and use our custom made injection pump wrench to make adjusting your DB or DS injection pump a breeze! Simply slide the tool into the...

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Billet Fuel Pickup Module

Billet Fuel Pickup Module

New for 2020! A Quadstar Exclusive product.  This billet aluminum fuel pickup module will completely replace and upgrade your factory fuel module in the 6.5L turbo diesel truck fuel tank.  Whether...
Ultimate PCV Catch Can

Ultimate PCV Catch Can

Our modern solution to an age old problem!  Application specific, this setup is designed to handle the high-flow requirements of turbo diesel engines that have unavoidable blow-by.  Alternative universal solutions...
6.5L BILLET STEEL FLEX PLATE

6.5L BILLET STEEL FLEX PLATE

Made from High Speed Alloy Billet Steel. Made to overcome common cracks and fatigue breakage of the stock flex-plates caused by high mileage and higher horse power builds. All flex-plates...
Quadstar Tuning Gift Card

Quadstar Tuning Gift Card

Shopping for someone else but not sure what to give them? Give them the gift of choice with a Quadstar Tuning LLC gift card. Gift cards are delivered by email...
Billet Fuel Return Log

Billet Fuel Return Log

Our solution to replacing the factory metal return lines on 6.2 and 6.5L diesel engines.  This kit is designed to replace both metal lines on the engine; the one across...