Quadstar Tuning LLC

Quadstar Tuning LLC Quadstar Tuning LLC is an automotive parts dealer specializing in the 6.5L turbo diesel platform

Another BEAST DS4 hot off the press! We let them sing at 1500 Pump RPM (3000 engine RPM) for at least 30 minutes to mak...
09/02/2026

Another BEAST DS4 hot off the press! We let them sing at 1500 Pump RPM (3000 engine RPM) for at least 30 minutes to make sure they are ready to rock and roll.

Apparently we had a few tunes to do!
08/25/2026

Apparently we had a few tunes to do!

💥Super 54 Turbo Kit is back in stock💥
08/19/2026

💥Super 54 Turbo Kit is back in stock💥

6.5L Diesel Header flanges ☑️
08/13/2026

6.5L Diesel Header flanges ☑️

DS4 Injection pump stepper motors are back in stock. These are a user serviceable part that will hopefully keep some tr...
08/10/2026

DS4 Injection pump stepper motors are back in stock. These are a user serviceable part that will hopefully keep some trucks on the road without full pump replacement!

6.5L OBD1 chips are back in stock 🪄. Switch On the Fly are coming next!
08/08/2026

6.5L OBD1 chips are back in stock 🪄. Switch On the Fly are coming next!

08/05/2026

Ever wondered why your 6.5L is so loud? 😱. Erik, your pump is ready! It's a ripper!

Just over here actually making the parts we sell! Appreciate you all 😘Lots of backorders will be shipped out this week ...
08/05/2026

Just over here actually making the parts we sell! Appreciate you all 😘

Lots of backorders will be shipped out this week yet!

If you're waiting on a plenum, thank you for your patience! The delay is coming to an end and we are cranking them out a...
08/05/2026

If you're waiting on a plenum, thank you for your patience! The delay is coming to an end and we are cranking them out as fast as we can! Feel free to reach out with any specific questions.

Our new revision of OBDI tunes will be available in the next few days. YES, we are also working on more Switch On The F...
07/29/2026

Our new revision of OBDI tunes will be available in the next few days. YES, we are also working on more Switch On The Fly OBDI tuners - ETA a few weeks yet. It's a process to keep this stuff alive with chips and parts being obsoleted and not cross referencing directly to something more modern.

Address

101 Dinnerbell Road Ste 2
Butler, PA
16002

Telephone

+12672097019

Website

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