Chip+Intake+Exhaust+Cams+Port&Polish+High-Compression Pistons+Rods

Total Cost: around 170-200k pesos. Add 20k more if you change the cylinder head.

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Turbo:

Total Cost: around 150k+ pesos.

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If you go secondhand with the mods listed on that site, it'll still cost nearly 100k. A secondhand turbo installation (with computer chip) will still cost way under 100k.