When I installed my BBK longtubes, they almost fell right on. I mean this was the easiest header install, I have ever done.The only hard part was tightening the flange nuts.And it wasn't really hard, just took a bit of patience. Anyone who has trouble installing these headers on a 3.7, has never don't many header installations. The job took less that 6 hours start to finish which included installation of the catted mid pipe. And I took my time.
And by the way. The results were well worth it. The sound improved dramatically, and the power and torque improvement is instantly noticeable.
2011 GT. Grabber Blue. Procharged. 3:73 manual.Billit LCA's. Corsa Extremes. GT 500 wheels. Racemaster DR's. T-56 Tremec. Dynotech DS . Centerforce DF. American Racing headers/high flow cats 560 rwhp.Donny Walsh tuned
2012 Pony Package. Race Red.3:31 automatic.BBK longtubes and catted X.FRPP Sport axlebacks. BBK throttle body. Dynotech DS. Brembo wheels and tires. Strut tower brace. Airraid CAI. Bama tuned.