From my personal experience, and from my friend that works at the local post office here in Angeles City, Customs fee's are based on what is being imported and how much it cost. but according to my friend, any Automotive or motorcycle parts and accessories that are being imported Customs can hold them and charge an amount based on the amount of the item that is being shipped, for example: if you have a care part that cost $500.00USD customs will charge you about $100.00USD just in customs duties and tax's.
So it really depends on what is being shipped and how much it cost you for the part's. And here in PH. customs have been known to steel some products. eg: one of my church friends had a box coming from Korea, when she got it the box had been opened and a lot of stuff was removed from inside it. the insurance from the carrier wouldn't cover it sense it was signed that it was delivered to PH customs. it took a month before she got the box from the time it reached customs in Manila.
even me, when i ordered a Trioval exhaust system from Haen, It took three weeks from the time it reached customs to reach me. and when i got it the exhaust canister has some deep scratches.
just some experience of mine to share.
