stm jm bumper diffusers

[Big Mike]

Saw the jm diffusers on stm"s website. Shows them installed on a 1g. Googled them to see if they really work? Didnt really get straight answer? Some say yes and some no? Anybody have real track PROOF that they knock off any time?

 

[91stocker]

Do you mean this:

STM: JM FABRICATIONS REAR BUMPER DIFFUSER

I've heard claims like "its worth 3mph" and etc. I can see the 1g rear bumper being a sail, its massive, so maybe i dont know, never seen proof either.

 

[spyderdrifter]

I can see them being functional for only what they were designed for, expelling built up air from under the car. This would decrease the air bubble under the car resulting in better aerodynamics. However, I think you'd get better results just by cutting off the lower half of the bumper....

 

[Big Mike]

yes those are the ones im talking about. Yeah thats what I saw also was 3 mph? After reading couple hundred posts Best I saw was two 10th's in 1/4. But seemed like one 10th might be realistic from all the posts I read? I agree on probably better results with cut bumper but dont wanna do that

 

[spyderdrifter]

I wouldn't want to cut it either. Would look kinda trashy.

 

[Big Mike]

Did you check out the pic they have on there sight? What you think about the look of them? They dont look to bad to me but wouldnt want them if they didnt function.

 

[spyderdrifter]

Yeah. Looks okay, except it looks like the trunk flooring gets in the way of them being fully functional. With that set-up, they don't appear to be used at their full potential.

 

[Big Mike]

Lol I agree. Just went and looked under my car. Gas tank hangs down good half a foot below bumper. Plus you would have to remove the metal bumper support assembly because it pressing right up agaist plastic bumper. Now that I look at stm's pics again appears that they did remove bumper? Lol screw that! Thx for your guys input tho !

 

[spyderdrifter]

Wow, that's a lot more to remove than I had thought. Was a good idea though.

 

[DWR-DSM]

They don't look bad. I never had them installed on my 1g yet