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Check all images for a size comparison on the CAP Heat Exchanger - the best heat exchanger for Audi 3.0T engine on the market. The size difference is very significant compared to OEM! Maximize size, minimize heat soak - to maximize performance and HP output.
The Canadian Auto Performance Heat Exchanger upgrade kit for the Audi B8/B8.5 S4/S5 and C7/C7.5 A6/A7 is the intercooler upgrade your vehicle deserves and needs to properly cool down. Engineered and designed to maximize the space available on the front of the supercharged 3.0T, this heat exchanger upgrade significantly reduces intake air temperatures which is vital in maintaining performance.
Although stock Audi's with the 3.0T supercharged V6 have sufficient cooling with the stock intercooler/heat exchanger, once upgraded to Stage 1 or Stage 2 and beyond, a heat exchanger and an effective cooling system are a must to maintain performance and reliability for Audi owners.
Known for being able to double power output (from stock applications of 333HP to modified applications of over 670HP), the Audi 3.0T supercharged V6 engine is truly a masterpiece. Its Achilles' heel is undoubtedly heat soak caused by high intake air temperatures. Cars without a high-volume capacity heat exchanger on Stage 2 upgraded pulley setups quickly become slower than even stock cars without any modifications due to this problem.
Upgrading your stock heat exchanger to the CAP all-aluminum heat exchanger will prevent the heat soak that kills performance from repeated pulls and even improves reliability, ensuring consistent flow. The oversized core is over 2.5x larger than the stock heat exchanger and maintains an efficient, consistent flow and lightweight design, better than other heat exchangers available on the market.
Important note: Heat Exchanger comes with aluminum brackets. Please note one of the brackets may need to be modified for 4.0T usage on the Audi S6/S7. Due to the sheer size of this heat exchanger, from what we know it is the largest on the market, some modifications are required on certain models. The pictured unit is for display purposes.
If you choose to purchase the Fit Kit with, then the heat exchanger will come with a high-temperature hose and fittings needed for install.
A heat exchanger in an Audi A6 3.0T helps regulate the engine temperature by transferring heat produced during combustion to the coolant. This process ensures the engine operates within a safe temperature range, optimizing performance and preventing overheating issues.
There are numerous benefits to upgrading your heat exchanger in place of an OEM version. Here are 14 reasons to treat your 3.0T Audi to this upgrade:
Avoidingheat soak & Increasing Horsepower
Significantly lower intake air temperatures
Significantly less pressure drop over OEM
Low turbulence
Anti-Corrosion
Thermal heat dissipating characteristics
Extensive quality control
Made to purge all air when installed correctly
Pressure tested after assembly
High-density fin core
Lightweight construction
Triple pass core
Drain plug to limit air from being trapped in
Increases reliability of stock supercharger intercoolers
Turn your 3.0T into a heat-soak-slaying monster with these proven combos:
CAP 3.0T Intercooler: Reduce IATs by 50°F+ under boost – the perfect partner for your heat exchanger.
CAP Crank Pulley Kit: Unlock instant throttle response with our 191mm pulley – dyno-tested for +80 WHP.
CAP Test Pipes: Ditch restrictive cats – pair with our heat exchanger for 25% lower EGTs.
CAP Velocity Stack Intake: Supercharger whine meets cold air – 18% airflow increase guaranteed.
Keep your Audi’s temps Arctic-cool with these pro tips:
Visual Inspections: Check for debris blockage every 5k miles – our high-density fin design resists clogging, but track rats should stay vigilant.
Coolant Health: Flush coolant annually with G13/G40 and use our drain plug to eliminate air pockets. Fun Fact: CAP’s triple-pass core circulates coolant 40% faster than stock.
Winter Prep: In sub-zero climates, add 60/40 coolant/water mix to prevent freezing – our 304 aluminum construction laughs at corrosion.
Pressure Checks: Spot a leak? Our lifetime warranty covers manufacturing defects – no questions asked (if you are the original owner).
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Excellent packaging and very nice looking final product especially nice welds. This heat exchanger is massive you won't think it will fit it has about 1mm clearance to the ac condenser mounting post. I ran mine so that I could directly attach the lower coolant hose on to the bottom connector without needing any fittings except a clamp, and then the other side ran an elbow fitting and either leave the hose with some slack or zip tie to the crash bar.
I agree with others seems like mounting brackets flush with crash bar is a good starting point, I mounted mine about 1/2" higher and ended up having to shave the inside of my rs4 grill slightly because I didn't feel like redrilling the brackets, it fits perfect though no issues at all with clearance.
Get some locking pinch pliers for the coolant hoses and headlight fluid line if you want to save your fluids, attach the hoses to the hex and fill it up first before taking the clamps off and should have almost no air in the system.
Would have liked some rough paper instructions to follow with torque specs for the bracket mounts and drain plugs but thats ok it's a 10/10 purchase for me thanks CAP!
Barely fits, you need to add a protective barrier where the hoses make contact with the mounting hardware. IAT's are perfect now, no loss of power after multiple pulls. Paired this up with a 187 mm crank pulley upgrade and Jackal Stage 2 93 octane tune, my B8 S4 6MT drives beautifully.
100% recommend this purchase.
Parts arrived earlier than originally indicated by UPS with zero issues.
Shipping arrived before scheduled time (UPS issue, would have been nice to know they were coming earlier than the day of). Opened packaging, product is mint and exactly as described online. Can't wait to install along with my stage 2 crank pulley upgrade.
Not too bad to install and I'm a total noob. Did the grille, brakes and rotors myself so this wasn't bad. Lined up the exchanger bracket to the top of the crash bar and fit perfect. Took a bit to figure the hoses but worked well. Used videos from Audi C7 owners YouTube channel which has very indepth installation series for heat exchanger. However no one has a vid up of CAP HE so I uploaded one. Great piece and can't wait to go dual pulley.
Fairly easy install, way bigger than the stock heat exchanger. Keeps the temps down very well. Would strongly recommend.
