Aly you wont be dissapointed with a Piper on your Gti.The quality is first class as is all of Pipers range that I have fitted.
Cant really say ive noticed a big difference when ive driven cars with this compared to a Raceland on but its very hard to compare unless you fit the manifold to the same car and do some power runs and compare the graphs.Thats the only way you will really find out the differnce.
The bore size of the Piper is thicker than the Raceland as is the wall size.
It all boils down to how much money you want to spend really.
Ive supplied and fitted loads and loads of Racelands and yes they can be pain to fit but they do a good job once fitted for the money you are paying.
Chris
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