TOP SECRET ADJUSTABLE REAR WING CARBON FOR NISSAN GT-R R35 TOP-SECRET-00127

 

TOP SECRET ADJUSTABLE REAR WING CARBON FOR NISSAN GT-R R35 TOP-SECRET-00127

This is a serious aerodynamic upgrade from Top Secret, designed specifically for the Nissan GT-R R35. The key engineering feature isn’t simply the carbon construction—it’s the adjustable flap.

🔧 What it actually does

The wing replaces the OEM rear spoiler and allows approximately 15 mm of flap movement, giving the driver the ability to alter the wing angle and therefore tune rear aerodynamic load. 

Think of it as:

Higher wing angle → more rear aerodynamic load → greater high-speed rear stability

Lower wing angle → less aerodynamic drag → better straight-line efficiency

The exact aerodynamic effect depends on vehicle speed, ride height, surrounding aero and the rest of the R35 setup.

🏁 Why the adjustable flap matters

For a performance-oriented R35, the advantage is being able to tune the balance rather than having one fixed aerodynamic setting.

Setting	General effect
Lower angle	Lower drag / more efficient
Medium angle	Balanced street/fast-road setup
Higher angle	Greater rear stability at speed
Track-oriented setting	Can complement aggressive front aero

Top Secret’s design has reportedly received positive feedback from professional drivers during circuit testing. 

🧱 Construction

The carbon version uses:

• Carbon-fiber wing section
• FRP endplates/winglets
• Adjustable flap mechanism
• OEM spoiler mounting-hole coverage
• Approximately 15 mm adjustment range

The carbon is supplied in raw form and normally requires appropriate finishing/clear coating. 

⚠️ Installation consideration

This isn’t simply a bolt-on cosmetic spoiler. Installation requires drilling two holes in the trunk lid, while the design is intended to conceal the original spoiler mounting holes. 

So I’d classify it as:

OEM spoiler → Top Secret adjustable aero → track-capable rear-end tuning

rather than just a styling modification.

🔥 Why it’s a particularly interesting R35 modification

The R35 already has sophisticated factory aerodynamic characteristics. Adding a large wing without considering the front/rear balance can create an aero setup that isn’t well matched.

The Top Secret approach is more interesting because the flap can be tuned rather than treating the wing as a fixed decoration.

For an R35 build, I’d pair the concept with:

Front aero → chassis/suspension → tyres → rear wing

rather than installing the wing in isolation.

Bottom line: TOP-SECRET-00127 is a premium JDM aero piece whose main selling point is adjustable aerodynamic balance, with carbon construction adding weight/style benefits. 

It is much more technically interesting than a conventional fixed carbon spoiler. 

TOP SECRET ADJUSTABLE REAR WING CARBON FOR NISSAN GT-R R35 TOP-SECRET-00127

HKS R TYPE INTERCOOLER KIT FOR TOYOTA GR YARIS GXPA16 13001-AT008

 

HKS R TYPE INTERCOOLER KIT FOR TOYOTA GR YARIS GXPA16 13001-AT008

The HKS R TYPE Intercooler Kit (13001-AT008) is one of the most technically advanced OEM-replacement intercoolers developed specifically for the Toyota GR Yaris GXPA16 with the 1.6L G16E-GTS turbocharged three-cylinder engine. 

Unlike cosmetic upgrades, this intercooler directly improves the engine’s thermodynamic efficiency by lowering the temperature of compressed intake air, allowing the engine to sustain higher power output without excessive heat soak.

The Engineering Problem

When the turbocharger compresses air, its temperature rises dramatically.

Typical temperatures:

• Ambient air: 25–35°C
• After turbo compression: 120–180°C
• Hard track driving: 180–220°C

Hot air is less dense.

Lower density means:

• less oxygen
• less combustion efficiency
• ECU pulls ignition timing
• higher knock tendency
• reduced horsepower

The intercooler exists to reverse this problem.

HKS Philosophy

HKS engineers designed this intercooler around continuous circuit driving, not just producing a single dyno number.

Their objectives were:

• maximum cooling efficiency
• minimal pressure loss
• OEM-level fitment
• improved airflow
• reliability under repeated heat cycles
• future-proof for higher horsepower builds

Unlike many oversized aftermarket intercoolers, HKS carefully balanced cooling performance with turbo response.

Massive Core Upgrade

Factory intercooler dimensions:

645 × 145 × 80 mm

HKS R Type:

645 × 205 × 105 mm

That means:

• approximately 41% taller
• approximately 31% thicker
• significantly larger internal air volume and heat-transfer surface area 

New Multilayer Core Technology

Instead of simply making the core bigger, HKS uses a multilayer bar-and-plate design optimized for both cooling and airflow.

Advantages include:

• stronger construction for high boost
• improved thermal conductivity
• lower pressure drop
• excellent durability
• more efficient heat rejection

The internal fin geometry is designed to maximize contact between compressed air and aluminum while minimizing flow restriction. 

Pressure Loss Engineering

A common misconception is that larger intercoolers always improve performance.

If airflow slows excessively, turbo lag increases.

HKS minimizes pressure drop by optimizing:

• internal fin density
• air passage geometry
• end tank design
• flow distribution

This preserves turbocharger response while increasing cooling.

End Tank Design

The cast aluminum end tanks are engineered to:

• distribute airflow evenly
• reduce turbulence
• eliminate dead zones
• maintain equal airflow across the entire core

Uniform airflow means every section of the intercooler contributes to cooling.

Why Cooler Air Makes More Power

According to the ideal gas law:

Lower temperature → Higher air density

Higher density means:

• more oxygen molecules
• more fuel can be burned
• higher cylinder pressure
• more torque
• improved combustion efficiency

The result is stronger, more consistent performance.

Heat Soak Resistance

The factory intercooler can lose efficiency after repeated acceleration or track laps.

The HKS intercooler’s larger thermal mass absorbs and dissipates heat more effectively, helping maintain:

• stable intake temperatures
• consistent ignition timing
• sustained power output
• reduced ECU intervention

This is especially valuable during track driving or repeated high-speed pulls.

Performance Benefits

Compared with the factory intercooler, the HKS unit typically provides:

• lower intake air temperatures
• improved mid- and high-RPM power
• greater resistance to heat soak
• more stable boost performance
• enhanced reliability for tuned engines

Exact horsepower gains depend on the tune and supporting modifications, but the larger benefit is maintaining power consistently, not just increasing peak output. 

Installation Notes

HKS designed the intercooler as a factory replacement for 2020-on GR Yaris models.

Important notes:

• Vehicles equipped with the factory intercooler water spray require the optional 13999-AT001 water spray bracket.
• For GR Yaris models produced after the 2024 update, HKS specifies compatibility requirements including the appropriate piping kit. 

Best Supporting Modifications

For maximum performance, pair the intercooler with:

1. HKS intercooler piping kit
2. High-flow intake system
3. Performance downpipe
4. High-flow exhaust
5. ECU calibration
6. Upgraded turbocharger (for higher power goals)

Together, these upgrades improve airflow throughout the entire induction system.

The Verdict

Engineering Rating: ⭐⭐⭐⭐⭐ (10/10)

Cooling Capacity: ★★★★★

Heat Soak Resistance: ★★★★★

Turbo Response: ★★★★☆ (well balanced despite larger size)

Reliability: ★★★★★

Track Performance: ★★★★★

The HKS R TYPE Intercooler Kit 13001-AT008 is one of the finest OEM-fit intercoolers available for the GR Yaris. 

Rather than chasing peak dyno numbers, HKS engineered it to deliver lower intake temperatures, reduced pressure loss, and sustained performance during prolonged high-load driving, making it an outstanding choice for spirited road use, track days, and high-power GR Yaris builds. 

HKS R TYPE INTERCOOLER KIT FOR TOYOTA GR YARIS GXPA16 13001-AT008