05-29-2014, 01:51 PM | #1 |
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Downpipes - AR Design or Ultimate Racing
What is the forums' opinion?
Can't decide which one to get. Dyno results for the Ultimate racing show 45 hp gain, and AR design states ~200 hp gain with tune.... What's your opinion, please?
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X5 50i Dinan Stage 4, Exhaust, Intercoolers/AR Design Downpipes
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