upper or lower grill block for volvo s40
Hi for front grill blocking or lower valance vents which would be best for aero. Volvo have made a front valance block to fit my volvo s40. Would i be better to follow volvo or just go with grill block. My volvo is fitted with a trip computer which measures temp in 1c increments so i could measure temp variantions quite accuratly. Any comments or advice will be gratfully received.
thanks
dave
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