I have been running 3 3/4" for 3000 miles and have never hit the frame once. Alot depends on the depth of your oil pan and bellhousing. My Champ pan was above the frame rails but my quicktime BH was about 1/2" lower than the frame. When I removed it all the powdercoat was still on the bottom. Considering my 3 3/4" ride height I was suprised it had never touched once.
I am at 4.5 inch front and rear. Only issue is parking lot curbs. That problem is a driving skill issue.
I have been to the weekly car show at the Scottsdale pavilion and have seen one OUTRAGIOUSLY high SPF, must have been 6 inches!!
Build started 15 Dec. 2002
Registered June 2009, kit delivered December 2002. Levy Stage 4,347,EFI TKOII, IRS, FFR 4 into 4 pipes, Roh 17 inch wheels, Nitto 555's, 275/40/17, 245/45/17. Power steering, C&R Water to oil heat exchanger. Levy / Ron Davis big radiator. Tweeker RT, WB O2 system. Street performer seats, tracks both sides, Levy pro bump steer, SN95 front spindles, FFR LCA's, Levy / Willwood brakes.
Lomborghini titanium silver, painted by Gordon Levy.
I'm at 4" front 4.5 rear. I've have had no problems with speed bumps or driveways but I have a couple of scrapes under the nose (they don't show unless you crawl underneath). The scrapes came from curbs which is a driver issue, which someone else already addressed. I also have to use additional 6' ramps when loading into my trailer. I have 24,000 miles with out clearance issues and I do go down dirt roads which are quite common here but with care.
Type 65,#181, IRS, pin-drive, 17" PSE wheels, Michelin 275F/335R , 347/425hp,TKO 600. Toyota/Lexus spectra blue/cosmic silver. 24,000 miles in 4 summers--a driver!
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