I have about 3" of clearance under my car. I scrap on everything. I need new pictures cause my car has settled lower than what you can see in my pics. Colorado has a lot of sharp angles on the streets. I can't afford to lose even a 1/4" on my car. I just can't see it happening unless I can get long tubes that don't hang any lower than the stock ones.
Springs doesn't have emissions testing anymore and I would love an O/R "H" pipe with long tubes. I'm far from done with this car.
its hard to route a turbo kit with longtubes...the only way you can do it correctly is to have like a U turn in the pipes to get them back into the engine bay. but as far as shorty vs. longtubes in NA or blower setups, longtubes are always better.
and as far as clearance goes, i have maxspeeds(cheap ebay springs) and it lowered my car over 2" and i havent had any big problems with the LTs scraping. but mine seem like they are setup a bit higher than some other companies.
With turbo's aside as they are a different animal compared to a Nitrous, S/C or NA setup, do not waste your time with shorty's! So no sense in comparing them.
On a NA engine and even a S/C engine LT's are better. They are just as much a pain to install as longtubes. They offer little gains in the powerband where LT's offer 15-20+. Longtubes will make a big noticable difference in power on the dyno and in the seat. They really wake up the low to midrange power on our cars where shorty's do not.
i have max speed springs as well. good 2.0 all the way around. mine was having problems cuz the pair i had was conflicting with my tranny. they were ment to go on a stick shift mustang and i have a auto. im not sure if clearance underneath would have been a prob or not, we didnt get them on
I used to run a set of FRPP Ceramic shorties, only because I got them on the cheap used. I would never spend the money on a new set of shorties. You can get a new set of Flowtech LT's AND matching X pipe for around $350 shipped last time i checked. This is what i used and had great luck with them. LT's make big torque gains, which is what the Modulars need. Here is a pic of the Flowtechs, you can't get much more ground clearance than this.