Thank you, Kho...
Most of the stuff we are buying "off the shelf" started as a prototype in someone's garage, and made from easily available materials. Companies take these "inventions", improve them by a few %, and charge 5 times what they are worth in order to finance their marketing, a & p and all the other corporate machinery required to mass produce these items.
A lot of thinigs in the car, can be done on your own. A lot of "improvements" in your car can be made from scraps. All it takes is some ingenuity and some time. AND...a whole lot of research and patience.
My last vehicle was my masterpiece. Sports Compact Car magazine had a series on modding a 3S-GTE motor to 650 bhp in 3 - 4 stages. It cost tens of thousands to do it. I hit 450 bhp (stage 2, I think) but spent only a third of what it was purported to cost. But, obviously, if you don't have the money to just order the parts and fit them in, you have to be patient and find ways to do it. Machine shops and other craftsmen are your best friends...
Unfortunately, in Malaysia, it's difficult to find even simple stuff to do thing... :sad_smile: