I had a 2007 STS zd30 manual patrol from new. Went to town on it with accessories, suspension & high end chips & engine mods. Kept the vehicle for 11 years, and changed springs & shocks on it 3 times in an attempt to obtain a softer ride. In the end sold it due to chronic lower back pain issue. After abuse, never broke anything on the patrol, other than auto locking hubs, but that's a known issue.
Bought a 2011 RRS in standard form (same suspension as D4) and it was the best thing I have ever done. Performance, ride, and 4wd abilities, it makes the patrol feel like a tractor. Done the Caernarvon track in SA with the RRS, and was excellent in every way. I did need to turn of hill decent as it nearly put me through the front window cresting hills off the throttle. 18" alloys copped some gouging, but ground clearance wasn't an issue when it was raised.
Youll love the D4.
The upgrade from leaf spring to coil spring, is the same upgrade from coil spring to airbag suspension.
2011 RRS HSE 3.0, Blacked out, Straightline exhaust system.
2010 D4 HSE 3.0, Autocode ECU, Traxide, Redarc EBC, Simoco SRM 9000 UHF.
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