Unknown Performance

01/28/2026

🚨Attention 350z VQ35HR Owners🚨

We are pleased to announce our new VQ35HR Twin Turbo Kit.

Featuring the same overall architecture of our proven VQ37VHR Twin Turbo Kit optimized for the VQ35HR engine.

Features:

-CSC Delete Compatibility

-2.5” Extra Thick 304ss Turbo Manifolds

-3.0” 304ss Down-Pipes

-Pulsar 5855g Turbos

-4.5” Thick Core UP Intercooler

-50mm BOV

-38mm Wastegates

-Turbo Support Bracket/Mounts

Available to order at: unknownperformanceusa.com

08/13/2025

Notice of Pricing Changes

Due to an increase of cost across virtually all material and parts used in our turbo kits; all turbo kits will see an increase in price starting August, 25th (8/25/25). Place your orders before August, 25th to lock in current pricing.

To offset the bad news, the next 3 turbo kit orders will ship FREE ($200+ value) when you use code: Boost

Order at: unknownperformanceusa.com

06/06/2025

🚨 New Product 🚨

Just in time for those summer IAT’s… The last intercooler you will ever need for your boosted VQ37VHR:

Our MASSIVE 4.5” wide UP Single Turbo and Twin Turbo Intercoolers.

Utilizing a 25”L x 9”H x 4.5”W core rated to 1600HP and custom end-tanks. Includes mounting brackets and hardware for the 370z/G37.

Get yours now and don’t let those high IAT’s hold you back!

Single Turbo Intercooler: $1450

Twin Turbo Intercooler: $1500

Available at unknownperformanceusa.com in the 370z and G37 sections.

01/29/2025

370z/G37 Twin 6262 Turbo Kits🥵

Featuring:

Pulsar 6262G Mirrored Turbos

2.5” 14g (extra thick) Stainless Steel Manifolds

3” Stainless Steel Downpipes

UP 4.5” Thick TT Intercooler (1000whp+)

Turbo Support Mount & Bracket System:
Pictured third; this system is designed to support the weight of the turbos, properly from the CHRA. Much like Nissan’s OEM catalytic converter bracket, our system protects your OEM or OEM style aftermarket headers from cracking under the strain the turbo’s weight places on them.

We have 1 kit left; available for shipping late February in our current production run. $7500 or $313 a month, available on our website: unknownperformanceusa.com

We are shipping kits and product daily! Keep an eye on those emails for tracking. We can’t thank all of our customers and supporters enough, you all are the best there is!

11/28/2024

Introducing a true 1200whp+ capable 370z/G37 twin turbo kit on the way for only $7500.

Featuring:

-Mirrored/symmetrical Pulsar 6262g (g35-900) turbos

-True 3” 304ss down-pipes

-2.5” 304ss manifolds

-4.5” thick intercooler (1500whp capable)

-Bolt-on install, A/C compatible with no modifications.

This is hands down the most potent forced induction kit available for your 370z/G37 on the market. Capable of growing with your power goals from OEM motor street car, to record setting builds.

If you can install test-pipes, you can install the manifolds and turbos. It’s that easy.

We have a very limited number of pre-sale kits available, including exclusive free add-ons worth hundreds of dollars. Contact us to place your order today and get yours before anyone else!

11/04/2024

2 kits of HR/VHR hot-side piping kits are hot out of the jigs and through first round of fitment confirmation.

We will have complete HR and VHR Mid-Mount Turbo Kits in-stock, ready to ship by (11/8).

We only have 2 hot-sides in stock. This means we can ship any of the following combos by 11/8:

-1 HR Kit and 1 VHR Kit

-2 HR Kits

-2 VHR Kits

Don’t wait for lead times to return order now and skip the wait!

Available at: unknownperformanceusa.com

02/15/2024

350z/G35 & 370z/G37 Mid-Mount Turbo Kits ready to ship March 1st! 🔥

We have been working to shorten our lead times and are excited to announce we now have a handful of our VQ35HR and VQ37VHR Mid-Mount Turbo Kits available on a 2 week lead time, kits will ship March 1st. Get your kit just in time for Spring!

Contact us or visit unknownperformanceusa.com to order today.

05/10/2023

⛽️ DEAL ALERT⛽️

Now until the end of May, EVERY 350z HR and 370z/g37c UP Mid-Mount Turbo Kit order will include, for FREE, a set of Injector Dynamics ID1050x Fuel Injectors w/ plug and play adapters for your VQ.

Do not miss out on this incredible deal to score the best injectors in the business for free! Deal ends May 31st. Financing is available at checkout on our website. (link to products in comments below)

*Credit for the cost of ID1050x can be applied to the cost difference for larger ID injectors (ex. ID1300x or ID1700x)

02/16/2023

HR 350z, 370z, and G37 coupe kits are rolling out the door and we have a few more available for order!

Youtube video discussing the kit is up, link in our bio.

To order visit unknownperformanceusa.com

10/22/2022

Custom sleeper Q50 kit we did for

We finished fabrication and fueling/supporting mod installs, did his magic, and Manny drove the car home to Las Vegas the next morning with no issues. We take pride in our off the shelf and custom kits that are not just affordable, but also reliable.

Order you kit from our website (link in bio) or contact us for custom inquiries.

10/21/2022

08/18/2022

Brett heading into the storm with his beautiful Nismo #878 with our UP Rear Mount Turbo Kit.

Owner: .z33

📸: .co