U need to know the CRSP value of the car. If you can tell me what car it is and I can advice you.

CRSP=Current Retail Selling Price.

This is used by KRA to calculate the duty

Yes CRSP is used to calculate...
So if your car is ksh 1,035,000 then duty will be ksh109,500 assuming 1st registration date is Jan-May 2003.

Its complex but it calculates something like this

CRSP.................1,035,000.00
Depreciation..70%... (for 2003 model)

Customs value............142,759
Import Duty 25%...........35,690
Excise Value.............178,448
Excise Duty 20%...........35,690
VAT Value................214,138
VAT 16%...................34,262
Total Taxes..............105,641
IDF Fees...................3,926

Total 109,567

You can talk to Lule he's a good clearing agent. He did good job for me. His number is 0720 731582.
Tell him you were reffered by Kim

if you need more info let me know.