RaggDoll Motorsports Turbo Inlet / Elbow

Unlock your turbo’s true potential

For Porsche 718 Cayman / Boxster 2.0 & 2.5T (Stock and Hybrid Turbos)

‍The RaggDoll Motorsports Turbo compressor Inlet is engineered to dramatically increase the efficiency and responsiveness of your factory BorgWarner B03G and K04 turbochargers — and is fully compatible with all 718 982 hybrid turbo upgrades as well.

By eliminating the restrictive, factory pre-compressor bottleneck, our inlet allows the turbo to breathe freely, improving both power and drivability across the entire RPM range.

Installing the RaggDoll Inlet is a highly rewarding upgrade — typically a moderate DIY and a straightforward install for most shops.

Independent Dyno testing shows 5–7% gains from stock to lightly moded and tuned setups, with up to 30+ horsepower gains possible on aggressively tuned and full bolt cars.

But the performance story doesn’t end there. Thanks to the massive increase in airflow, power comes on faster, builds sooner, and holds stronger — and your Porsche 718 982 Cayman or Boxster will sound incredible, with a sharper, more aggressive induction roar under throttle.

Why a Better Inlet Matters

Factory Restrictions: Why They Exist

OEM engineers intentionally design stock turbocharger inlets with restrictions — not because it’s optimal for performance, but to meet other priorities:

• Noise Control: Smaller inlets muffle intake induction sounds to meet global noise regulations.

• Warranty Durability: Slower airflow and less pressure fluctuation means less mechanical stress on the turbo system over a long service life.

• Emissions: Restricting peak airflow can also help stabilize boost response for emissions certifications, especially during transient testing.

While this balance works for mass-market reliability, it leaves significant performance on the table — especially when tuning or modifying your Porsche for higher boost levels or track use.

Airflow Restriction (Choking the Turbo)

The stock inlet is smaller than the S and GTs turbo’s own compressor mouth, forcing the turbo to work harder to pull in air.

When the turbo struggles to breathe, it generates more heat, reduces compressor efficiency, and sacrifices potential power

• A restricted turbo pulls less air (lower lbs/min), stressing the compressor and reducing its operating efficiency.

• Example: A GTS turbo may want to inhale 53 lbs/min— but the factory inlet can’t deliver that volume cleanly, forcing the turbo to operate outside its optimal range.

Increased Velocity and Pressure Drop

According to Bernoulli’s Principle, as airflow speed increases through a smaller passage, static pressure drops.

This vacuum effect forces the turbo to pull even harder, delaying boost and increasing thermal load.

• Higher pressure drop at the inlet = slower spool, more lag, more heat.

How the Dimpled Texture Improves the RaggDoll Motorsports Inlet Performance

 The RaggDoll Motorsports Turbo Inlet features a precision dimpled interior surface designed to optimize airflow dynamics.

Rather than allowing smooth laminar airflow to separate from the walls during high-velocity bends and transitions — which causes turbulence and pressure loss — the dimpled coating creates a controlled micro-boundary layer.

This thin turbulent layer keeps the primary airflow “glued” to the inner surface, preventing flow separation and reducing overall drag through the inlet tract.

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Key Technical Advantages:

• Improved Airflow Stability: The controlled boundary layer maintains higher velocity and prevents flow stall around curves and diameter transitions.

• Reduced Pressure Loss: By keeping air attached to the walls, the inlet preserves more intake pressure into the compressor.

• Faster Turbo Response: Smoother, more stable airflow promotes quicker turbo spool and stronger midrange power delivery.

• Higher Volumetric Efficiency: Better flow management allows the turbocharger to operate more efficiently across the RPM range.

EliminatesCompressor Surge Risks

• The RaggDoll Inlet eliminates airflow restrictions.

• Maintains a perfect match between turbo demand and available air supply.

• Prevents compressor surge and fluttering noises.

• Delivers smooth, stable, and consistent boost.

• Reduces long-term wear on turbo bearings and components.

• Ensures reliable, efficient turbo performance under all conditions.

Decreased Turbo Lag

Restricted inlets cause a delay in airflow build-up, meaning the turbo takes longer to hit target boost.

The result? Sluggish throttle response and reduced low-end torque.

A properly sized, high-velocity inlet like the RaggDoll design restores the immediacy and sharpness your car deserves.

Lower Intake Air Temperatures (IATs)

Turbulence and pressure losses caused by stock inlets heat the incoming air, making it less dense and less power-capable.

Hotter air also increases the risk of knock or detonation under boost.

• Cooler, denser air = more power, more timing, and safer combustion under high-load conditions.

The Bottom Line

• More Airflow = More Power

• Faster Boost Response = Quicker Spool

• Lower Temperatures = Safer, More Reliable Power

• Louder Induction Sound = Addicting Driving Experience

Whether you’re stock, tuned, or running a hybrid turbo, the RaggDoll Motorsports Turbo Inlet is the upgrade that lets your Porsche 718 Cayman or Boxster breathe — and roar — the way it was meant to.

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Technical Features

• Aluminum Construction – lightweight, heat-resistant, and highly durable

• Outflows Factory Inlet CFM capacity by about 125% (2.25× the flow).

• True 3” Internal Diameter – consistent size throughout, no hidden neckdowns

• CNC-Machined Inlet and Outlet Flanges – perfect fit, optimal sealing every time

• Velocity Stack Funnel Transition – smooths airflow entry to reduce turbulence and pressure drop

• Internal dimple Texture – boundary-layer management to maximize airflow efficiency

• New O-Rings Included – fresh seals for a leak-free install

Feel it. Hear it. Own it.