The purpose of a turbo catless pipe is to liberate exhaust flow in order to create more horsepower. In performance cars, one of the chief hindrances many drivers come across is inhibited exhaust flow. Stock exhaust systems hold back exhaust gases, which chokes performance capability. Installing a turbo catless pipe is a big step towards freeing up this exhaust so your car has more of a hop in its step.
A turbo catless pipe is used in place of the OEM catalytic converter. This is not a casual customization, because to use a turbo catless pipe means taking out an emissions control device. However, the cat slows down performance by restricting airflow. Sidestepping the cat in favor of an Invidia front pipe helps get exhaust moving with greater fluidity. Once exhaust has more freedom, your engine can churn out a few more horses.
Aside from HP, another perk of catless front pipes is a deeper and more pronounced exhaust tone. It is not overly loud and aggressive by itself. But if installed in addition to other aftermarket exhaust components, a catless front pipe can help contribute a ferocious rumble that sets in even more as your foot finds the accelerator.
Invidia front pipes are installed by bolting on to your existing stock exhaust or an Invidia performance exhaust. If your model is several years old it is recommended to use new gaskets during installation of the Invidia front pipe and toss out the old ones. Invidia front pipes have thicker flanges than OEM pipes and if gaskets are worn, there is a higher risk of exhaust leak.
As for their construction, Invidia uses stainless steel for all of their catless front pipes. After being molded, they are put into a mandrel bender and then bent according to the necessary shape and placement conducive to your model's exhaust specs. Each steel front pipe (regardless of model application) displays a 60mm diameter. Exhaust flows effortlessly through, unraveling a lot of the restriction that was previously to blame for your car's performance lag. According to several dyno tests, the consensus is that this part can help add between 5-7 HP.