Anywhere from around 2.5k to 15k depending on how far you want to go. If a 4 seater coulson trim in your vl is the idea in your head, budget for a fair slice more than 2.5k.
mate if you're getting your licence in two months that means you're not allowed performance mods...exhaust and **** will get you a big fine and 3 demerit points atleast. but if you dont care, go LSD...why re-trim a vl exec you're probably gonna thrash anyway? also spools are illegal, but again, if you dont care...