some of the cheap cheap stuff i did myself (with help of
friends)
1. speaker board sagging...fabricated speaker board and bought 2nd
hand 6 inch speakers for $30.
2. Car damn noisy. Sound proof car doors, boot, bonnet and under
the seats.
(this one i actually bleed as the door metal frame very sharp and
scratches my hands when i stretch in to position the sound proof
mat.
3. Almost did CAI myself but realise no good position for the air
intake to position in front. (have to cut hole in chasis - heart
pain. so i drive slower lorr)
4. Now awaiting grounding wires and gonna do it with friends.
Care to share what u DIY yourself? maybe we can share pointers and
do more things our selves and save money...=)