A1 class 11 exhaust

This is by far the superior exhaust to run on a Class 11 race car . This exhaust has also become very popular for people to run on a lowered VW beetle because it allows for more ground clearance than any Exhaust on the market. We have done extensive Dino testing with these exhaust systems and have found that the one and 3/8 merged header creates more back pressure and therefore more power on a performance 1600 cc engine than the one and a half inch header. This is the exhaust that we run and that is why this is the exhaust that we sell as well. We try to always keep them in stock and ready for next day Shipping.