keep the duels......never go w/ a b&b tri-flow. My buddy had that, it was HEAVY as hell and it cost him about 12 rwhp lost due to adding it, needless to say, he switched back to duels.
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2001 Z/28 6speed. TSP 231/237 598/595 112 cam, PRC .660 lift valve springs, titanium retainers, TSP 7.4 hardened push rods, Lid w/ Amsoil filter, Longtube headers, TSP true duels, richmond 4.10 gears, SLP maf, LS2 timing chain and gear set, Clevite rod and main bearings, ARP rod bolts, Power bond 25% UD pulley, Custom tune by RPM performance, BMR subframes, BMR LCA's, Edelbrock TQ arm, BMR panhard bar,315/35/17 MT ET streets on black ZR1's... 395 rwhp 381 rwtq
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