I've got a 2008 SS Auto which just hit 100,000 miles and I'm thinking of replacing the engine and trans mounts. I'm willing to spen on the OTTP parts if it will be an improvement but I'm struggling with what parts to buy. They seem to offer these three mounts:

https://www.overthetopperformance.co...nt-_p_262.html
https://www.overthetopperformance.co...nt-_p_268.html
https://www.overthetopperformance.co...Mount_p_3.html

Or maybe a fourth also, I find it harder than necessary to find HHR stuff. I've sent them two requests to answer this question with no response. So any suggestions?

 

Have a look at TurboTechRacing, they’ve been vendors here for years. Many SS owners have installed the upper engine mount and a front and rear transmission mount. Not many replace the upper transmission mount

https://www.chevyhhr.net/forums/hhr-...-review-40681/

 

I seem to remember the mounts are different between 5 speed and auto.
The HHR SS has not been made for 15 years, and a relatively small number made before that.

 

Yes the manual transmission upper engine mount is different from the automatic transmission mount

 

TTR doesn't seem to have automatic transmission mounts. The price for the engine mount is about the same between the 2 companies. I like that the OTTP is rebuildable. I do like all my TRR mounts. I'd say go for it!!

 

The best choice depends on hove you use the car.

I have a manual. I researched and decided on the OTTP engine mount, to minimize wheel hop, "just in case." Stock mounts elsewhere. Only tested it once. Seemed to work OK. For frequent burnouts I would want everything as stiff as possible.

The item I got LOOKED LIKE the 3rd item in the OP, but I don't have record of the item number. They say it's for all HHR, but I'd ask questions first. https://www.overthetopperformance.co...Mount_p_3.html

There are tales out there of long deliveries from OTTP in some cases and less than stellar communication. I don't know if it's deserved because they have really good products and may not care if they lose idiot customers. My single encounter was smooth as silk.