Outdated Petrol & Diesel V8 engines for the ETK 800/K series 4.2.1

New update here adding a few new contents, improvements in the exhaust's sound and bugfixes

- Added a new naturally aspirated "high rpm long block" that can rev up to 8250rpm and produce 450hp
- Added one new config both for the ETK 800 and K series using the new engine
- Added the new induction system jbeam, the turbos can now be damaged/broken, even though there's no model for turbos/intercooler for now
- Improved the headers and exhaust jbeam, now the exhaust's sound will change if you remove the part
- Improved the engine's and exhaust's sounds, the muffling should be way better now
- Fixed errors in some configs