I will first admit that we have only worked extensively with the ACR-X headers from BBG (similar designs to many others), and Belanger (Viper specific) over the 9+ years I have been here with a dabble in a couple others before that, but my take is this. After 45-50 installs I know that on the dyno the ACR-X header and most 5 into 1 designs will make more power on top then the Belangers. I feel from my use that the Belangers "drive" better then the dyno suggest, but that may be my own psychosis. I have never done a side by side identical drag race comparison other then runs down the front straights of a few tracks in similar, but not identical cars, with that said I never felt that I was ever under powered compared to an ACR-X equipped car.
As far as fit and finish my personal opinion is the Belangers are first rate. I like the precision, the flanges, weight, welds and the coating. The install is flawless every time, I cannot say the same for the ARH product and that is by no means BBG's doing, Toddy does a wonderful job with the headers, he does not actually build them though. That also being said I know that Toddy has a special personally built header that will be coming out and from what I have seen it will probably be the absolute BEST out there. He is very meticulous about everything he does and I commend his efforts. Will it be expensive? YES certainly it will be, but you will see design and execution beyond your expectations, and if they come as I have seen them, I will be proud to offer them to my clients.
Price, quality, and service are top notch with M&M!
He's a fountain of knowledge. I can't say enough good things about Lou, he's a class act behind a great header. Belanger headers came with an O2 sensor **** in the merge collector originally. Then he moved it to the primary tube and kept it there. His reasoning is that closer to the block the better the accuracy and response. But, upon request, he will add a **** in the collector. I'm with you in that reading all 5 cylinders is better than reading one. No issues with the O2 in the merge collector here except for one which seems to be common when the O2 is moved to the collector with OEM O2's, regardless of the header. The PCM may throw a CEL related to slow O2 response. I forget the actual CEL code. Before the SCT came out, the only way to remedy this CEL was to install aftermarket "quick fire" sensors. Now, the SCT can adjust the O2 parameters to alleviate this issue. Toddy can do it and I know others are using SCT to do the same should the issue come up.
