This Astra GTE is a full on race car kicking out over 250Bhp. The tired old exhaust was neither big enough nor up to the job of meeting the noise regulations. We designed and built a system using 2.5 inch mandrel bent mild steel pipe and boxes big enough to keep the noise within the regulations. the object is to get maximum flow which normally means just scraping in on the noise test. This one had 4db to spare. On race cars it’s important to get the whole thing tucked well up so it doesn’t get pulled off if the car runs wide on a corner. Extra hangers ensure this race car sees the chequered flag every time.