My vehicle, 2008 Malibu with 2.4L Ecotec with 4spd transmission.The Dorman product for the 2.4L Ecotec is 03422. That pack runs about $40. They are 9.8 grade studs/nuts advertised with locking flange nuts. The genuine GM replacements are $5 a piece. It appears they all come with pre-applied red loctite on the head end.I looked everywhere for a cheaper alternative that matched the specs of the OEM ones. Until I came across these, there was only one other set I found & it only had 8 in it.However, this Dorman product, 03411, is a great alternative. They are 10.9 grade studs/nuts. Other than that, the only other differences are these are a tad longer, maybe 5mm or so, & these don’t come with pre-applied red loctite.The little longer length is a non-issue. Also, no other set of manifold studs I viewed, for any vehicle, had red loctite pre-applied. I have no idea why the Ecotec set is the only one with that. The old ones that came out of my engine had no evidence of having red loctite on them. So I’ll take my chances without it.These studs fit perfectly into the head & the nuts torqued down perfectly, they are locking nuts too, it just doesn’t say it on the pack. So pretty much they are a perfect alternative to the “OEM” set that costs 400% more.The Ecotec engines are well known for cracking their manifolds. Haven’t seen anyone talking about why they crack though. It’s because of a design flaw in the manifold converters they have. The cat converter portion either doesn’t let heat dissipate properly under normal function, or they get clogged very quickly thus not allowing to heat to dissipate properly. Either way the heat backup cracks the manifold. In addition to the cracked manifold, 2 of my studs were sheared off. Got what remained out with a quality “easy out” set, but didn’t trust the remaining 8’s strength. So I used this 03411 set to replace them all. Use a genuine GM manny gasket too.This set worked perfectly for my needs. Can’t beat the $8 price!