LT's and then a tune. If your still wanting more (who doesn't) then a cam would be my next mod.

 

How did your install go on your Dynatech headers? Any serious issue with fitment? I also have a Corsa-sport cat back system. One other thing did you go with your existing cats or buy the cats w/ the cross-over when you bought your headers?

 

The fitment should be fine with dynatech. But other header like lt etc sometimes problem with fitment. But you can work things out with this.You just simple direct to put on it and play. IF you get a dynatech. They have highflow cat include. It should be no problem to bolt together with your catback. I think it is ypipe with highflow cats. But you would need to get tune pcm to cover for 02 sensor. That way you wont get engine check light on.

 

I recently just put one OBX LT and the y pipe was about 4" to long and didnt match up to my existing cat back. Clearance and fitment was great. Could have just been my truck it is a flexfuel. It just convinced me that i wanted true duals anyways and i hacked the y pipe up.

 

My Dynatechs bolted right up with no fitment issues. I purchased the whole system and that included the crossover pipe with high flow cats. It sounded great combined with the Corsa sport cat-back. I imagine that it would be crazy loud if you leave off the cats. If I were to do this again I would have had the headers ceramic coated. And of course a good tune will optimize these mods.