Here is some reading on the components from trygstad.... probably best items for upgrading the etec. Read the note at the bottom of the page too....
I run Trygstad stuff He will not call it a gain if it shows a spike in horsepower it has to show a solid gain.I chatted with a mod shop in new york aswell and he said that there's a company that claims 5hp on a Y pipe and it made 1 HP and second pull on the dyno lost 3+hp becarefull its a game,but he is buddies with rich dailey and he said dyno ports did make some power Lol wouldn't say how much ,but said it never lost like other's.He tested 5 diffrent Y-pipes. Cheers Trygstad E-tec did goood in jackson hole and his BB with (Tom Roby)piloting it. Good job guy's.There are lots of choices for spending money but the etec is sooooo good the way it is, the only thing you really need to doo is remove the stock muffler and replace with a can. Its only going to net 10 lbs or so weight loss and make it sound like a modded sled.....lol
If you want to fiddle and wrench, then add a turbo and have fun.... Although that 872 etec big bore from trygstad looks good too....its just $$$$$$
Well I will tell you first hand that the slp pipe kit works. Tons more mid range trq/hp gains. Top end you just pulls hard, 5 mph more track speeds. Not a ton but you can feel it. We have compared a stocker to just a slp setup, jumping from one to the other right after and it works. I would recommend it to anyone.
was this slp on a 2013 xm?, ive heard that people are reporting a loss on the 2013 xm with slp.