All 2006s were 3.5L. All 2007-10s I5s are 3.7L. The first Alpha was made in 2008.

Somebody put a 3.7L in your 06 like Hummerz said............

 

Yeah, the previous owner didn't mention that at all, thanks for helping me figure it out guys!

 

That's a good thing better engine. Just order parts for the 3.7L.

 

Damn it, was planning on returning this gasket set for a refund and explain to them how it doesn't fit.

I've had the truck for 4 years now, this engine always ran great but just discovered oil on the 3rd cylinder spark plug and it's not coming from the top.

 

Sadly, mistakes happen in life and we live and learn as we go. Some, such as this are fairly easy to bounce back from. Get the 3.7L set and have a happy day!

 

Local auto parts stores will exchange for the right part offsetting the cost +/- and send the original back to the supplier for repackaging. You Live, You Learn!