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Originally Posted by mail4ajo If porting and polishing is so good for the engine and increases the performance, why doesnt the manufacturer himself give us a ported and polished head??
What stops them from doing this? I guess this will some effect on the life of the engine, else why should the maker not port the head?? |
No maker explores the limits of an engine simply coz it needs to restricted to meet emission norms. That’s the biggest concern!