The cylinder head got CNC porting for our high response race kit as well as CNC combustion chamber processing.
The block is a special 3,400cc engine for which we also produced water plugs.
Of course, it has billet crankcaps as well.

Then there’s the drysump which is from another company.

The image was taken at the customer’s factory, and the assembly was done by their staff as well.

Today we’re modifying the connecting rod metal to make it the main metal.
It’s a considerably reckless process, but the connecting rod metal was the one that fit best.
We processed the oil groove inside the flat connecting rod metal. It took a good amount of time to complete as it was produced with a jig tool.
Now that we have secured the oil path, the next step is to drill the oil hole.

We have just received an SR20DET for an engine overhaul.
Thank you for choosing Naprec.
We’ll turn this engine into something very special!

We’re working on making a big throttle for an RB26DETT.
Recently, there have been many cases of damaged throttles for RB26DETT’s.
Especially cases where the resin collar inside the return spring has deteriorated and has broken.

We are enlarging the inner diameter of three throttles from 45mm to 49mm.
They will also be getting a wet blast finish.

We are building a dry sump oil pan for an SR20DET.
Can’t show too much, but this is what the inside looks like.