Aftermarket aero & downforce parts for R35 GT-Rs

Let’s begin with the Splitter & Skirts. There are many options, vendors, and even knock-off versions out there for both items. When choosing your splitter, make sure to check reviews and feedback from other owners who might have experienced with some of the parts you find. When I say “Knock-off versions”, it doesn’t mean fake or bad (some eBay ones are!). There are good vendors, who offer similar Splitters/Skirts styles based on original ones, at almost half the price. (Knock-offs usually refer their part name with “xx Style“).

Fitment & installation is key! For Splitters or Front lips, you need to bolt them up correctly, even if it means you need to drill and add more bolts for security. Remember, you don’t want these Splitters flying off at 150+mph!! Be aware: minor scrapes from time to time, might feel okay, but it’s NOT!! I’ve had minor scrapes here and there, and was shocked at the results, while removing the undertray to replace my new splitter. (CLICK HERE TO SEE THE DAMAGES).

For a street driven GT-R, I would recommend looking for Quality Knock-offs, to save some $$, while still getting quality look-alikes. I have experienced Splitter & Skirts from Rexpeed, who offer styles such as the well-known Kansai Service splitters, and Zele. Both fitment and carbon quality of the K-style Splitter (Kansai type) and Z-style skirts (Zele type), were excellent. I’ve had both on my car for over 5 years, with no issues at all. The K-Style splitter offers an Air Duct option that has the Splitter pre-cut to insert the ducts outside-in, which I did not like. The ducts did not fit well, and left them sticking out a little. If you are a perfectionist, avoid the duct option!

After somehow losing one of my ducts, I’ve decided to look at other vendors, who offer splitter with the ducts pre-molded. I chose to order the N-Tune Nismo Style Splitter (#N100-1001). This splitter is made from pre-preg carbon fiber materials (2×2 weave), and includes functional brake ducts for cooling, as well as high grade aluminum brackets for support.

The N-Tune splitter fits CBA and DBA models. Just so you’re aware, these stick out a bit below the LED DRL’s on the standard DBA bumper, since the Nismo bumper protrudes there. Compared to my previous Splitter, the N-Tune is less aggressive, sticks out less, and sits higher from the ground. However, in my opinion, the styling looks better, brake ducts are functional (built-in), and feels much stronger/durable.

For N-Tune parts, reach out to Eugene at EPI Motoring – Best support! (+1-626-695-0525)

Rear Diffuser

Next, diffuser options. I wanted a more aggressive rear-end look, without having to replace the whole factory diffuser. The Difflow Diffuser Fins were the best option I came across. You can choose the fin depth, I went with 4.5″ (street friendly). It comes with 5 Fins, support rails, all necessary hardware, and attach to your existing OEM undertray. Excellent quality and extremely durable! I’ve hit & scraped these fins many times with no issues.

*I don’t think they offer the “fins only” option anymore. The fins now come with their diffuser tray, which replaces the OEM. (Difflow 5-Element Railer)

Wing & Trunk

Finally, Wing & trunk setup. Again, many options out there with different results on Drag & Downforce. I got the JCR Swan neck GT Wing & RevoZport DN Trunk, which turned out beautiful IMHO. Both can be bought separately, with the option to have them in Gloss or Matte carbon finish. The trunk also has the option to have the single or double-sided Carbon. (Mine is double sided). The fitment & quality is excellent with an unbelievable weight difference in weight compared to the factory wing/trunk.