I heard about this story before from Danzeterna too. Apparently this owner did modifications to the firewall with the help from Proton's engineers to get it all done legally. But this 6A13TT choice is an uncommon one. Most will just go for 4G63T since they are lighter, easier to get parts and less trouble to swap.perdana has choice to go up to 2.5 litre. 6a13tt if im not mistaken. There only 1 story i heard, perdana owner able to get puspakom approval on engine mounting change, but Proton mod the mounting. Seems legit to get puspakom approved in this case.
if proton does not have the 25%, there are alot of protonolution out there.
Already got the way to go around this rule but need more money. 4G67 block with 4G63T pistons and other parts.haha...stop them before it goes crazy.......
Go Youtube, can find a video. Herehaha perdanas.... duno if anyone pandai pandai shove in a terbalik 6a13.... something tells me somehow.. someone would probably have tried.....
back then... so many accidents involving those crazy evo converted cars with almost 0 attention to safety.... hantam pokok, the car literally obliterate themselves. there's a thread on these things here on zth long ago i think...
https://www.youtube.com/watch?v=SC7Aa2NuA38
There is one thread about a horror crash involving a Satria with 4G63T engine. Can search for it here.
Now we can probably conclude that Proton's chassis cannot take that much stress from 4G63T. But how about Honda cars? Those Civic with K20A? Will they develop cracks on chassis or they can withstand it? To be honest, I'm actually surprised that these K series swap on older Civic is allowed because modifications to mounting is definitely needed. Meanwhile, older Proton cars cannot be swapped with those newer 'terbalik' CK 4G9 and 4G6 engines legally. Not even the newer 4G15 turbo found in Colt is allowed...