I have stock manifolds and mid, just an slp catback. It was tuned after rebuild, fuel pumps, injectors, maf and cai added after rebuild but before tune. I can't remember how many miles I drove it for the break in but I followed the instructions of the shop, no long idling, changing the rpm while...
It does seem to run good and afr is good, I hear a ticking noise somewhere underneath but I believe it's the exhaust manifold. Looking through the plug holes the pistons look very black like carbon buildup, maybe blow by?
2003 cobra coupe 65000 miles. Had the engine rebuilt in fall of 2020 (it had a leaking intercooler and no compression on cylinder 8). I was not given a full parts list but what I was told (that I remember) was replaced: every seal and gasket inside the engine, pistons, intercooler, plugs, wires...
Looking for some factory OEM front and rear springs for 2003 - 2004 Cobra, car has Eibach red springs and is just too low for the area I live in (probably too low even with factory springs but worth a try). Already replaced the exhaust once as the mufflers just got beat up too much and cracked...