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I have both a CSF Aluminum radiator and Oil cooler (oil cooler from e46 M3 modified to fit the Z4M) and am very pleased with fit and performance.
Cannot speak to long term road use reliability but I can vouch for its durability and capability with keeping temps under <200* F even on the hottest of track days. I have nearly 50 track days on mine with only great performance.
If it's a street car, another option is getting an oem replacement from FCP with a lifetime warranty.
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1995 E36 M3 | BMW CCA Club Racer - IP #34 | Gray / Blue / Orange | 261WHP | 2,700lbs
2013 E92 M3 Competition 6MT Slick Top | AW / Fox Red |
2006 E86 M Coupe | Silver Gray / Imola | JRZ RSTWO | APR Aero | Sparco Seats/Belts | Weichers Cage
Gone: 2017 Audi Q7 | 2011 E93 328i 6MT | 2014 Audi A6 | 2010 VW CC 2.0T | 2011 G37 S Coupe 6MT | 2004 G35 Coupe | SW20 MR2 Widebody Turbo
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