Zod

Just as the title states, if a car was tuned for pulley n shorti headers, but later on got LT's is it really going to have that much of an impact that it could damage something?


Thanks

Blue_Monster

YES,
I would think so

bbearden

Yes, significant improvements in flow on the exhaust side can cause a lean condition. Whether or not it is detrimental on our engines w/o a tune is something I'll let someone else answer. If you've done long tubes, why not go ahead and round out your mods with a pulley and tune?