1.3.1b
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- Reduced engine brake strength (its no CAT!).
- Added volume/pitch variation to engine brake "stages".
- Improved jake brake sound.
- Overall reduction of very-low end frequencies.
- Fixed International LT engines.

1.3b
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- Added International LT (by FRANCK PERU)
- Added engine fan that randomly engages.
- Replace and renewed the Jake brake sounds entirely.
- Added "off-the-gas" exhaust sound (airy).

v1.2b
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- Added volume curve to 'turbo' sound so that it isn't audible at very low RPMs (pulling off).
- Tweaked exhaust idle volume.
- Tweaked engine whine volume.
- Increased 'unloaded' engine volume.
- Overall volume increase by 1db.
- Added hot engine ticks when engine is switched off.

v1.1b (inital release)
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- Fixed a bunch of engine torque numbers that got mixed up.