Honestly I would need first hand experience to see how fitment is to give you an honest answer.

 

OEM.... not JDM though

 

I agree with your assessment. I hear you are quite the expert in that field.

 

I have worked on my fair share of headlights, I find the JDM ones to be a bit on the small side and are alot harder to work with since I have big hands.

 

Oh, while you're at it, i suggest you check the fitment of the rear bumpers.

 

Normally if the fitment on the headlights is firm the bumper tends to be the same, but there odd cases where the headlights are great and when you check the bumper its gone.

 

Make sure the undercarriage is not sagging as well

 

Undercarriage is pretty much out in the open so its either good or bad. I like to make sure the muffler is clean and not covered in mud, had a few bad experiences if you know what I mean.

 

mud on the exhaust could ruin a good run. Check the intake too to make sure there's no leak and it has good suction

 

Depends if it's a FI model or not, if it's a FI > NA because suction is insane at full boost, but sometimes NA gets the job done.

 

which reminds me, make sure there's no oil consumption or leaks in the cylinder. Make sure it has a tight seal when doing a compression test.

 

Better yet check to see if it has been bored out to a larger size or not. I always prefer to lube the piston first, shoving a piston into a dry cylinder can cause alot of damage.

 

which oil do you use to lube the cylinder? High viscosity or low viscosity? Make sure it handles well under a huge load. Do you sleeve the piston before putting it in the cylinder?

 

If it's a clean cylinder, I don't bother sleeving it, in the rare case that they cylinder is blown out I always sleeve.

Viscosity is a totally different ball park. Sometimes the cylinder is self lubricating and other times you just have to spit on it to get the piston in.

 

See how the ride is. Check if its stiff and remains relatively still or if it goes crazy and bounces around a lot. Also see how loud the car gets when you drive it aggressively.