Next Level Performance
September 5, 2026 • 9 min read
A Porsche 997 Turbo cooling upgrade replaces the factory intercoolers and radiators with higher-capacity aluminum units that lower intake-air and coolant temperatures – the smartest first modification for any 2007–2009 911 Turbo (997.1) or 997 GT2 that gets tracked, tuned, or driven somewhere hot. The 3.6L twin-turbo Mezger engine makes 480 horsepower and 460 lb-ft from the factory (the GT2 pushes 530 horsepower), and every bit of that output turns into heat the stock parts struggle to shed once the car is worked hard. A proper upgrade protects the engine from heat-related power loss and keeps timing where the tuner set it. Below, our Tampa, FL team walks through exactly which parts fit, what each one does, and how to install them.
Our Verdict
The AWE Tuning 997TT/GT2 Performance Intercoolers are the single biggest cooling win for a 2007–2009 911 Turbo, and pairing them with CSF’s all-aluminum radiators builds a track-ready cooling system.
Start with the AWE intercoolers to cut heat soak on the 3.6L Mezger twin-turbo, then add CSF B-Tube radiators to hold coolant temps in check on hot laps and stop-and-go Tampa traffic alike.
Shop Our Top Pick →Why the 997 Turbo (2007–2009) Runs Hot
The 2007–2009 Porsche 911 Turbo (997.1) is powered by the legendary 3.6L twin-turbocharged Mezger flat-six, rated at 480 horsepower and 460 lb-ft of torque; the 997 GT2 turns the same architecture up to 530 horsepower. All of that boost creates heat, and the 997’s rear-engine, side-mounted intercooler layout gives the charge air a relatively short, tightly packaged path to shed temperature. On a cool day cruising the highway, the factory system copes fine. Push the car on track, in traffic, or with a tune, and the small OEM intercoolers heat-soak – intake air temperatures climb, the DME pulls timing to protect the engine, and power tapers off pull after pull.
In our Tampa, FL shop we see the same pattern on nearly every hard-driven 997 Turbo that comes in for datalogging: the car pulls hard on the first run, then noticeably softens on the second and third as intake air temperatures climb. That is heat soak, and it is exactly what larger intercoolers are built to fix.
Coolant temperature is the other half of the equation. The 997 Turbo relies on a three-radiator arrangement – a left, right, and center core – tucked behind the front bumper where they collect road debris and, over 15-plus years, corrosion and reduced efficiency. Upgrading both the intercoolers and the radiators is the definitive fix, and it is a genuinely fresh upgrade path for the 997 platform: most 997 Turbo owners chase exhaust and tunes first, then discover that thermal management is what unlocks consistent, repeatable power.
The 997 Turbo Cooling System, Explained
A complete Porsche 997 Turbo cooling upgrade has two distinct jobs. The intercoolers cool the compressed air leaving the turbochargers before it reaches the intake; cooler, denser air means more oxygen, safer timing, and steadier power. The radiators cool the engine coolant that circulates through the block and heads. You can address either one independently, but the biggest, most reliable results come from doing both.
Side radiators mount behind the front bumper on the left and right.
Step 1: Bigger Intercoolers
The AWE Tuning 997TT/GT2 Performance Intercoolers replace the undersized factory side-mount units with larger bar-and-plate cores that hold more volume and resist heat soak. Because they are a direct-fit pair for the 2007–2009 Turbo and 2008–2009 GT2, there is no custom fabrication – and AWE backs them with its No Check Engine Light Guarantee. This is the top pick for anyone starting a 997 cooling build.
Key Specifications – AWE 997TT/GT2 Intercoolers
Step 2: High-Capacity Radiators
CSF has manufactured radiators for more than five decades, and its 996/997 units use a 2-row all-aluminum core built with the company’s exclusive B-Tube technology. Instead of a conventional oval ‘O’-shaped tube, CSF forms a ‘B’-shaped tube that is brazed over the seam. The design increases heat-transfer surface area by roughly 15% within the same footprint, creating dual liquid laminar flow while using thinner, lighter, and actually stronger aluminum. Multi-louvered fins are wind-tunnel tested for maximum heat rejection. The left and right side radiators fit both the 996 and 997 Turbo/GT2.
CSF’s 2-row B-Tube core adds about 15% more heat-transfer surface area.
For 996 Turbo, 997 GT2, and 997 GT3 owners, CSF also offers a matching center radiator to complete the triple-radiator layout. Confirm your exact model and trim – the center radiator’s Turbo fitment covers the 996, while its 997 coverage is the GT2 and GT3.
The center radiator completes the front triple-radiator array.
Porsche 997 Turbo Cooling Parts Compared
Here is how the four core components of a 997 Turbo cooling upgrade stack up. The AWE intercoolers are the priority purchase; the CSF radiators are the natural next step for track use and high-horsepower builds.
| Part | Type | Fitment | Core / Material | Price |
|---|---|---|---|---|
| AWE 997TT/GT2 IntercoolersTop Pick | Side-mount intercoolers (pair) | 2007–2009 Turbo, 2008–2009 GT2 | Bar-and-plate aluminum | $1,745.00 |
| CSF Left Side Radiator | Coolant radiator (driver side) | 996 & 997 Turbo/GT2 | 2-row all-aluminum B-Tube | $725.00 |
| CSF Right Side Radiator | Coolant radiator (passenger side) | 996 & 997 Turbo/GT2 | 2-row all-aluminum B-Tube | $725.00 |
| CSF Center Radiator | Center coolant radiator | 996 Turbo, 996/997 GT2, 997 GT3 | All-aluminum B-Tube | $525.00 |
What We Think of the AWE 997TT/GT2 Intercoolers
The AWE intercoolers are the highest-impact single upgrade on this list. They are a straightforward direct-fit pair, they carry AWE’s No CEL Guarantee, and they attack the exact weakness of the stock 997 Turbo – charge-air heat soak – that costs you power on repeat pulls. The two caveats are shipping restrictions in California and the labor involved in getting to the side-mount location.
What We Like
- + Larger bar-and-plate cores drop intake air temps and resist heat soak on repeat pulls
- + Direct-fit pair for the 997 Turbo and GT2 – no cutting or custom piping
- + Backed by AWE’s No CEL Guarantee for peace of mind
Things to Consider
- – Cannot ship to California addresses due to CARB regulations
- – Rear-bumper removal makes this a half-day install for most DIYers
AWE’s larger bar-and-plate cores replace the heat-soak-prone factory units.
How to Install a 997 Turbo Cooling Upgrade
Answer first: a DIY-friendly enthusiast can install the AWE intercoolers in roughly 3–5 hours, while a full radiator replacement is a full-day job because the front bumper and A/C condensers must be removed and the cooling system bled. Here is the general sequence – always follow the factory service procedure for your car.
Tools and prep
You will need metric sockets and hex/Torx bits, a torque wrench, trim tools for clips, jack and stands, drain pans, and fresh Porsche-approved coolant for the radiator job. Work on a cold engine, disconnect the battery, and set aside labeled bags for fasteners.
Intercooler replacement (per side)
1) Raise the car and remove the rear wheels and inner fender liners. 2) Remove the rear bumper cover and any charge-air ducting to expose the side-mount intercooler. 3) Loosen the boost hose clamps, remove the factory intercooler, and transfer any brackets. 4) Fit the AWE intercooler, reconnect the charge piping with the supplied hoses and clamps, and confirm every clamp is seated. 5) Repeat on the opposite side and reinstall the bumper and liners.
Radiator replacement
1) Drain the coolant into a clean pan. 2) Remove the front bumper cover, then the A/C condensers and ducting to access the side and center radiators. 3) Swap in the CSF radiators, reusing OEM mounts and hardware. 4) Reassemble, refill with the correct coolant, and bleed the system fully – the 997’s long coolant runs trap air, so follow the bleed procedure carefully and check for leaks at temperature.
All-aluminum construction resists the corrosion that plagues aging OEM radiators.
If you are not comfortable removing bumpers or bleeding a coolant system, our Tampa, FL shop and any competent independent Porsche specialist can handle the install. For related upgrades, browse our cooling collection and engine performance parts.
Frequently Asked Questions
Does a Porsche 997 Turbo really need a cooling upgrade?
Yes – any tracked, tuned, or hot-climate 997 Turbo benefits from a cooling upgrade. The factory 480 hp (530 hp in the GT2) generates significant heat, and the stock side intercoolers heat-soak quickly during back-to-back pulls or lapping sessions. Larger intercoolers and higher-capacity radiators keep intake and coolant temperatures stable so the engine holds its timing and power.
What is the difference between the intercoolers and the radiators on a 997 Turbo?
The intercoolers cool the pressurized air from the turbos before it enters the engine, while the radiators cool the engine coolant. The 997 Turbo uses two side-mount air-to-air intercoolers plus a triple-radiator layout (a left, right, and center radiator). A complete cooling upgrade addresses both: AWE intercoolers for charge-air temps and CSF radiators for coolant temps.
Which years and models do these 997 cooling parts fit?
The AWE 997TT/GT2 intercoolers fit the 2007–2009 911 Turbo (997.1) and the 2008–2009 GT2. The CSF left and right side radiators fit both the 996 and 997 911 Turbo/GT2, and the CSF center radiator fits the 996 Turbo plus the 996/997 GT2 and 997 GT3. Always confirm your exact trim before ordering.
How much does a full 997 Turbo cooling upgrade cost?
Expect roughly the $1,700 range for the AWE intercoolers and around $500–$725 per CSF radiator. A complete package of intercoolers plus the side radiators lands in the $3,000–$3,200 range before install. You can stage the build – intercoolers first, radiators later – to spread out the cost.
Can I install 997 Turbo intercoolers and radiators myself?
Many experienced DIYers install the intercoolers in a driveway in about 3–5 hours per side of the job, since access requires removing the rear bumper and some ducting. Radiator replacement is more involved because the front bumper and A/C condensers must come off and the system must be bled. Budget a full day and have a proper coolant-fill procedure ready.
Will bigger intercoolers add horsepower on their own?
On a stock tune, larger intercoolers mainly restore and stabilize power by preventing heat-related timing pull rather than adding big peak numbers. The real gains show up on a supporting tune and on repeat runs, where cooler, denser intake air lets the engine make consistent power instead of falling off as temperatures climb.
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