ISIS Intake Manifold CUSTOMER REVIEW

I just received my ISIS S13 SR intake manifold from Enjuku Racing Parts, LLC and decided to write a quick review since I saw a few people were wondering about it.

After initially receiving the package I broke it open, and gave everything the once over. My initial impression was that the manifold looked very good, especially considering its over 450$ cheaper then the Greddy manifold. The high polished finish is nice, and the casting on the inside of the plenum looks surprisingly good, there's no real rough jagged edges like Ive seen in some of the Freddy ebay manifolds.

Fresh Out of the box:

And the casting on the inside.

So after looking it all over I threw it on a spare motor I had in the garage to check initial fitment.
It slides over the studs and bolts to the head without any issues, and the IACV bolted on with no problems as well. The stock throttle cable bracket also bolted on without issue.
There was a small issue with bolting on the fuel rail, the bolt hole furthest to the rear of the manifold didn't quite line up, but we managed to solve this really easily by just slightly dremel'ing the bolt hole in the fuel rail.

Here are a few pictures of the manifold on the spare motor.

And here is kind of a blurry pic, but you can see the bolt whole not quite lining up.

Another small issue I ran into was that the throttle body bolts bottomed out and needed to be slightly shorter, so I ran to the hardware store and bought 4 slightly shorter bolts. I may have been able to get away with stacking 2 extra washers on each bolt, but I decided to just run out and grab shorter bolts.

So after sorting out those slight kinks we threw the manifold on the car. Installing it went smoothly, I bolted it up, hooked all the necessary lines up, dremeled the fuel rail slightly on the back mounting point, cut my stock S13 greddy piping, and put on a 45 degree coupler and fired the car up. I'm sure you could also just buy the greddy cold pipe designed for this manifold, but I had a 45 degree coupler available and really wanted to get the car on the road.
Once I started it up the car ran fine and after making a few pulls it was obvious that the car had a noticeable increase in top end power.

And here are a few pictures of it installed on the car.

So all In all, I feel this was definitely a great buy, and for anyone technically sound enough to remove and install an intake manifold, making the small modifications (Dremel the fuel rail bolt hole out slightly, and buy shorter throttle body bolts) shouldn't be an issue, and is well worth the 450+ dollar savings.