4-2-1 nga dapat, and don't get an extremely free-flowing exhaust tube and muffler combo, as it will KILL your torque.

If I were you, I'd spend the extra 2000p for the K&N, it's worth the security.

I'd think twice about doing ANY exhaust mods beyond a mild header and muffler build, as ATs suck gas really badly with exhaust mods.

The best fuel saver you can get is good tuning, a good (synthetic) motor oil (not any lower than 5w30, 0w are dangerous to use on really old engines...), good tires and light mags.

Yes there is a 74 Stingray here, but it's very hard to catch. The owner is part of one of the Classic Car groups that go up to Tagaytay on the odd weekend.