This is just my 2cents. Check your dip stick and see what color is the oil. If it's really dark then it's a must that you have to change your oil. Everyone drives differently and on different conditions. Some can go 5k and others maybe up to 8k. I'm a autotech not that makes a difference lol.
If the car originally came with the automatic trans you must change the car ECU for a manual transmission one because the old ECU will be looking for signal from the old trans and that's where the big expense will come to convert it.
When I was going for my automotive degree I ask my teacher about this and in simple terms he said short intakes are great for hp but you loose torque and CAI is for adding torque but you loose top speed which relates to HP. I have a K&N typhoon (short ram intake) which is perfect for me because...
I actually have those JDM astra switch backs on my other car with no issues. U need to install 2 resistors in order for them to function well and last longer. I'm actually going to make a harness to support the resistors to the switch backs.
Anything that's has to with the rear brakes requires to convert the hub assembly to hold the new hub with the disc breakes and caliper next thing is changing the proportioning valve. Not if there's any difference on the axle beam from a corolla with drums and the one disc's
Nicely done man. So the 2-3/4 & 2-5/8 fit well then. I'm actually thinking of doing that for my Rolla too. Just to give an extra wow factor when I do uber lol. I currently have blue leds on the side where the skid plates go.