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LS4 or 5.3L have the same bell as a 60?
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sigpicHow to make High performance Emissions:
A "true" High flow converter, straight pipe.
Low/No flow EGR valve, block off plate.
Carbon canister and purge valve mod, place in large 30 Gallon can, cover, and place curbside, the city will do the rest.
PCV valve and vent tube, reroute to exhaust to dump where it belongs, on the ground. Or add breathers and let it all free. -
I believe that the transverse version (LS4) is the 60* pattern but the longitudinal 5.3L is different. No experience but I happened to pick this up because it's a popular Fiero swap.
~sam
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