Cool, the reason I ask is because I'm building my exhaust for my V8 project ATM and am worried about the exhaust loading up the extractors too much from engine torque(1UZ). It's a 2.5inch twin system in 1.6mm thick 304 stainless so it will be very rigid, too rigid I think. I'm thinking about putting a pair of these couplings between the extractors and the cats.