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A straight cut tailpipe tip was empirically evaluated for the effect that the tip's orientation to a cross-wind had on the ability to reduce exhaust system backpressures associated with the purging of the combustion products. The straight across tip was attached to a vehicle at various angles of inclination to their axes while exhaust back pressure and performance readings were recorded. Testing indicated that there is a preferred orientation to reduce backpressure. Attempts to match on-vehicle data with wind tunnel data were met with partial success.