Tomei Large Capacity Oil Pan SR20

The quality of these oil pans are nothing short of magnificent - simply a beautifully crafted piece of artwork. They can be a little fiddly to install if the installed studs (4 studs are required during install [supplied]) are not 100% perpendicular from the lower cradle of the engine as the 4 studs need to line up to the oil pan which has very small holes (ie no leeway upon mounting). 

Sway bar clearance is a little tighter than the OEM oil pan but not by very much. Coupled with Nismo engine mounts my 27mm whiteline sway bar still has plenty of gap. Clearance depends on ride height though as a lower car will bring the sway bar closer to the oil pan.

They say its +600cc but I found it added a litre of oil capacity. I usually fill up 3.5L on my redtop SR20 but after fitting the Tomei oil pan it took 4.5L to reach the top mark on the dipstick. Perhaps because I had the oil draining for nearly a whole week at the shop..

I'm not entirely convinced that the hinged doors/baffles are really necessary on SR20 oil pans. If you ever look up at the dipstick when you have the oil pan removed you'll see that the top oil level mark on the dipstick is situated well above the highest point of the oil pan: approximately an inch - meaning the oil level sits an inch above the joint of the lower engine cradle and the oil pan. In my opinion (and its just an opinion) the OEM oil pan without baffles is sufficient enough as it already has an upper oil control plate (attached to the lower engine cradle) as standard and its a very tiny oil pan to begin with. 

What you see in this photo is the aforementioned oil control plate.

Extra capacity helps to stabilise the oil temperatures but I found it only helped the tiniest bit. For example, I would hit 120*C within 5mins of running hot laps at Wakefield but with the Tomei pan it would take perhaps 6-7mins of the same sort of driving to reach the same temperatures. Its definitely no substitute for an oil cooler.

From my findings extended oil pans like Tomei/Greddy etc etc are not an entirely necessary item to have.
What is necessary are oil coolers!