[BMWZ4RIDER]

I am ready to pull the trigger on my set of H and R Lowering spings for my 09 base suspension Z'ed

The part number that come s up as the only spring set available from H and R for my Z , again base suspension is H and R part #- 28987-1

However I also found the below H and R comparison charts

H&R Springs Comparison Chart

Application Lowering
Handling
Ride
Alignment
Fitment
Considerations

OE Sport Springs
Handling -Average Everyday Driving
drop Drop -Subtle .025"-1.0" Drop
Fitment-Similar to O.E.
Considerations. Same as New O.E.
Same as O.E.
None

Sport Springs
Sporty Everyday Driving
Lowering Average 1.25"-1.8"
Benefit : Less Roll/Squat/Dive
Ride Firmer than O.E.
Fitment- May Require Alignment Kit
Considerations-May Require Alignment Kit

Race Springs
Track Use, Limited Street
Average 1.9" Drop
Very Little Roll/Squat/Dive Very Firm
Alignment Kit Recommended
May Require Corresponding Suspension Modifications

Super Sport Springs
Sporty Everyday Driving, Occasional Track Use
Average 1.75"-2.3"
Moderate Roll/Squat/Dive Sporty
Alignment Kit Recommended
May Require Alignment Kit

is the part # 28987-1 considered the Sport Springs? as this is the option I would prefer?

Has anyone installed theses.
I can easily rent the spring compresser for the front.
Are any special tools required?