Oh agreed manufacturers normally inflate their numbers. Just inspect the item when you get it, Megan aren't exactly known for high performance parts and the cheap option on eBay. Products are known to rust.
It's a shame Abbey may not be able to give you a direct dyno report on the headers. Reports are nil to a little increase on my350. Bang for buck is very poor.
I disagree. The power to £ ratio isn't any worse than an exhaust. People just think its expensive because of the labour costs.
My headers cost me around £600 (purchase & install). £600 wont get you a decent exhaust setup