1 - After my cars been off and parked for a while... The first time I start driving it will jerk at about 10 mph. Kinda like I let the clutch out to fast and almost stall. But thats not the case. And it only does it the first time I start driving. I can stop right after that and start again and its smooth... Any ideas?

2 - If I tap my breaks hard, it jerks my steering wheel. Is this a sign of something getting loose or needing replacement? Breaks are good.

Mods are - one ball, promini CAI, 15% pulley, obx header, 19mm rear sway bar

 

maybe the bypass valve is starting to go for #1...

#2 is brake system related. Check to make sure the calipers slide freely on the guides, the pads move freely in the carriers, and that your piston seals aren't torn, maybe one torn on one side. Seems like one side of the brakes is grabbing first, and that would be due to one of the calipers not putting force down well. Higher pedal pressures win out and that's why the system seems good.

Matt

 

#2. Check the front brakes on the side opposite from the direction of the pull. If it pulls right, check left side, etc.
If your caliper isn't sliding properly, only one pad (the one on the piston side) is making good contact with the rotor. First signs are uneven wear on those two pads. Look carefully. They should be the same thickness.