Fixed, but explain properly though? For a complete forged engine, decent ECU, custom plenum, etc you could be looking at well over $10k. For those of us with limited budgets it can be done for a lot cheaper. Ie. Manifold - $600 T28 - $400 Exhaust - $1000 Adaptronic - ~$2000 fitted and installed 2nd hand cooler + piping - $400 Assorted bits and pieces - $400 There you go, less than $5k if you can do the work yourself.