mine is hollowed on my z1 in the vlx as well and lean burn is smooth. its a vx manifold to vx cat and a vx downpipe and that bolts up to the lx converter (i would recomend doing this to your dx as well) that way you know the engine is getting the correct backpressure.
what kind of hesitation is it? does it stumble and carry on? or does it just bleed off like you are losing power?
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