HKS Superior Spec R Exhaust systems are the highest end exhaust system offered by HKS. Made of full titanium, the exhaust is not only durable, but is extremely light weight in design. Only weighing in at an incredible 22lbs, this system is much lighter then the stock setup. Larger radius piping allows for optimize exhaust gas pressure and temperature allowing peak performance with an aggressive exhaust tone. The dual layer titanium tips help reduce heat while the slits inside the tips helps assist in noise reduction.