Porsche 911 991 GT3 Manifolds

Sorting the exhaust manifold on your Porsche 911 991 GT3 is one of those mods that quietly underpins the whole build. The manifold controls how exhaust pulses leave the cylinders, which has a direct knock-on effect on turbo response, back-pressure and temperatures. A quality performance manifold, built with proper runner design and good materials, helps the engine breathe more freely, supports consistent power delivery and can improve reliability when you start leaning on the car with more boost and harder driving.

On turbocharged setups, the manifold is effectively the turbo’s foundation. A well matched unit can help the turbo spool more predictably and hold power for longer into the revs, especially when combined with a freer-flowing downpipe and exhaust system. For naturally aspirated engines, a tuned-length manifold can help smooth out torque delivery and make the car feel more eager across the rev range. Either way, picking the right manifold for your Porsche 911 991 GT3 is about building a balanced package that works with your existing upgrades, mapping and future plans, not just chasing headline numbers.

Here you will find a range of manifolds, headers and related exhaust upgrades from proven motorsport and tuning brands, so you can choose the setup that best suits how you actually use the car, whether that is daily road driving, fast road, or serious track work.