Listings with DIESELSITE as the supplier will be backorders due to Hurricane IAN. Feel free to email us ahead of time if you have any questions.
6.5L 2/0 Battery Cable Upgrade Kit
Complete 2/0 battery cable kit for your 6.5L truck. Great for replacement or upgrade; these are larger than the factory cables and will ensure you only have to do the...
Regular price $27500 $275.00
Heavy Duty Glow Plug Harness
Genuine, upgraded, replacement glow plug wiring harness for 6.2 and 6.5L diesel engines 12ga high temp wire, all protected by fusible links and heat shield All connections are crimped AND...
Sale price $15999 $159.99Save $15
6.5L 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...
Regular price $35000 $350.00
6.5L 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...
Regular price $60000 $600.00
6.5L 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...
Regular price $35000 $350.00
Quadstar Flex Fit Hat
Genuine FlexFit Trucker Style Hats embroidered with the Quadstar Tuning Logo One size fits most - 6 7/8"-7 1/2"
Sale price $2499 $24.99Save $10
THE BEAST DS4 Injection Pump
Meet the ONLY high output DS4 injection pump available for 6.5L turbo diesel applications. Proven anywhere from stock power to 452 HP at the wheels, this pump is ready to...
Regular price $2,50000 $2,500.00
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...
Sale price $5499 $54.99Save $30
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...
Regular price $7499 $74.99
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 the...
Regular price $1499 $14.99
Bosch Marine Fuel Injectors
Your online outlet for premium quality 6.5L turbo marine style injectors. Each injector is hand-built with genuine Bosch nozzles. Pop pressures are balanced within +- 3 BAR. Remember, just because it...
Sale price $57499 $574.99Save $24
Dually Fender Clearance Lights
Another Quadstar Tuning exclusive! These are direct-fit bolt-in replacements for the factory 1988-98 C/K 3500 GMT400 dually fender lights. Simply remove your faded or broken originals, connect two wires per light, and...
Sale price $6999 $69.99Save $20
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...
Regular price $23595 $235.95