I tried a couple of different pipes that I have seen reccomended on here. I used a 053 and a 086 made by Power Racing (I got a deal on both). I ended up going with the 053 at the small track I run at and think the 086 may be better suited to a larger track. Question is with so many mfg.'s now making pipes, how much different is, say the 053 between them all. Seems to me that the Nova 9853 and the Grp 2053 for example should be pretty close to one another. I had thought all pipes were spec.'ed by EFERA for the most part. Any help would be great because the price differance between some pipes is alot for what I would think are the same pipes.