I disagree. I used a spacer on mine and it was open with my divided plane intake and actually helped in bottom end and torque. Sure a large tunnel ram won't help any on lower RPM and torque but this is such a small "tunnel ram" that it just helps the fuel and O2 blend better and creates more power.
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1979 Chevrolet Bonanza Big10 "Tootsie Roll"
1985 Chevrolet Silverado (wife's)
Member of the Southern Bowties Club
"Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson
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