Vehicle-specific boost leak testers for Cummins.
Check the engine and year in the product name, or text us a photo of your setup and we'll point you to the right kit.
For Cummins-powered Ram 2500 and 3500 pickups, the 6.7L tester fits 2007.5 to 2024 trucks and the ISB 5.9L tester fits trucks up to 2007. Both are premium billet aluminum 30 PSI kits. Order either on its own or with the extension line and shut-off valve. The ISX and CM870 tester is listed here as well for larger Cummins engines.
| Kit | Fits | Gauge | Fill / extension | Best for |
|---|---|---|---|---|
| 5.9L ISB | Ram 2500/3500 up to 2007 | 30 PSI | Tire valve | DIY owners |
| 5.9L ISB with extension | Ram 2500/3500 up to 2007 | 30 PSI | 5 ft line with shut-off valve | Filling from outside the engine bay |
| 6.7L | Ram 2500/3500 2007.5–2024 | 30 PSI | Tire valve | DIY owners |
| 6.7L with extension | Ram 2500/3500 2007.5–2024 | 30 PSI | 5 ft line with shut-off valve | Filling from outside the engine bay |
| ISX / CM870 / Volvo D16 | Semi trucks | See listing | See listing | Class 8 engines |
| N14 | Kenworth T2000 with N14 | See listing | See listing | Class 8 engines |
