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.
Cummins testers for pickups and big trucks. The ISB 5.9L tester fits Ram 2500 and 3500 trucks up to 2007, and the 6.7L tester fits 2007.5 to 2024 Ram 2500 and 3500 trucks. Both are premium 30 PSI kits, sold with or without an extension line and shut-off valve. For heavy trucks, there are testers for the N14 in the Kenworth T2000 and for the ISX and CM870. The 4" to 6" large frame shop kit with extension hose and regulator is listed here too.
| 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 |
