You really are out to just contradict anything I say aren't you? Why did you even start posting in this thread? You've been nothing but a wet sock the whole time. I saw the OPs picture and realized what he was running. That's how I knew it was header to custom pipe to muffler. Headers back and headers all the way back is the same. Its admitted that there are headers. Then its admitted that there is a full exhaust system. Manifold back and header back is different.
Oh yeah you must have meant this Infinity Q45 exhaust manifold.
2002 INFINITI Q45 Left Exhaust Manifold
Man-i-fold! Not header
These are an example of long tube headers
Holley Performance Products Ceramic Headers 32100FLT
Shorties
Motorator Blog - Stainless Steel Shorty Headers for 2010 Camaro SS
Mid-length headers
BRP Hot Rods: 1 5/8
So can we end this now grumpy gus?