Did anybody watch the Speed TEST DRIVE show with Jimmy Johnson, Johnnie O'Connel, and Tommy Kendall at Carolina Motorsports park? These 3 legends in similar road-racers, at 505-700 HP, and then traded-off cars. One Hour of torque-management and HP banter, that helped the viewer understand WHY +2 or +5 HP at redline does not matter in a road-track car. Dont be romanced by 2-3 HP when you have 605+ to start!
If you are building onto a passenger-cockpit, street equipment, A/C car, destined to be below redline for 98+% of its life, when WAAAY LESS HEAT matters, and low-end and midrange grunt matters more, when ease of install matters, then Belanger is your best choice. And Stainless resonates at a higher PITCH than Belangers deep, musclecar tone = metalurgy of Aluminized steel, not stainless: Heat and Pitch. Belanger is on many Dodge Engineers and exec personal cars for a couple of good reasons. And was on the mule ACR-Xs for even more good reasons.
If you are building 25-50 SPEC-race cars, Footwell and cockpit Heat No matter, and need 25-50 quickly-built good headers, [price sensitive bid x 50 sets,] and can still meet the bar to Belangers promised HP, and maybe ADD some single-digit HPs near redline. NOTE the MoPar PCM IS REQUIRED with that X-header: Then DO CHOOSE some other brand of header than Belanger for your RACE CAR. Belangers are prohibited on ACR-X in the SPEC series. But NOT prohibited on YOUR car! Where the Mopar PCM is also OPTIONAL.
Another PS:
MK, your Oreca Clone was QUITE LOUD as I recall, sidepipes too, I last heard it in the garage at VOI-8 ! So you will recall the wail of the Belanger Full Meal deal soon enuf.