Customer Cases
Real performance gains from real customers. See how Rennen ITB’s by JSR systems have transformed air-cooled Porsche 911 engines.
Porsche 3.0
Nikolaj
"What a quality product, a piece of art just to look at."
Modifications:
RENNEN small bore ITBs
10.5 compression ratio
964 cam
Dual coil-on-plug
Porsche 2.7
Morten
"The Rennen ITB’s by JSR was easy to install and setup. They really help bring out the power of this engine."
Before - 175HP
After - 271HP
+96 HP gain
Modifications:
RENNEN small bore ITBs
Compression ratio 10.5:1
Dual coil-on-plug
Sports camshaft
SSI exhaust
Porsche 3.2
Martin
"Much faster throttle response with the Rennen ITB’s by JSR. Now the car just picks up and goes!"
Modifications:
Headers and sports exhaust
RENNEN small bore ITBs
Porsche 3.0
Lars
"Both the power and torque improved massively with the change to Rennen ITB’s by JSR and they sound amazing above 4,000 rpm..."
Before - 243HP
After - 265HP
+22 HP gain
Modifications:
Compression ratio 10.5:1
Dual plugs
Sports camshaft
SSI exhaust
Ready to Upgrade Your Porsche?
Experience the difference that precision engineering and advanced design can make in your air-cooled Porsche 911.