Invidia calls them test pipes, but they are also called race pipes. Call them whatever, but know this: Putting these in place of your cats means one thing...power. Invidia also makes a high flow cat version for your 370Z / G37 to free up extra horsepower while remaining street legal. For the Nissan 370Z / Infiniti G37, Invidia makes them from polished T304 stainless steel tube and welds on heavy duty flanges for perfect fitment. Test pipes are for off-road use only.
Invidia test pipes come in pairs.