No, it doesn't
And just FYI, no 4-stroke engine runs better with any "back pressure", that is misinformation from long ago, a "myth" if you will
Car makers started using scavenging exhausts back in the 1940/50's, i.e. "headers", these create a LOWER pressure at the head's exhaust ports to pull exhaust out leaving more power in the crank, usually mid-range RPM has lowest pressure so best "free power" added, but you can make them for low-range or even high-range power increase, but not all 3
What happened, and where the "myth" comes from is that people would install larger pipes on the heads, "free flow" setup, and then go for a test drive
"HEY, What The F***, I LOST POWER!!!!!!"
Incorrect conclusion was, "this engine must need back pressure"
What they lost was the added free power from a scavenging exhaust manifold they just removed
The scavenging exhaust happens in the manifold, the size and length of the pipes and the size of the collector are all engineered to set when the lowest pressure will occur, low RPM, mid RPM or high RPM
Even drag racers use this when each cylinder has a single exhaust pipe, the size and length of this pipe WILL give a lower pressure at the exhaust port at a specific RPM so near that RPM the extra power will be felt
Some people use "X" or "H" crossovers on Dual Exhaust systems to squeeze a bit more out of this scavenging effect
But as long as you use the same size pipe, or larger, from the end of exhaust manifold to tail pipe, you won't effect the scavenged power
Rangers all came with mid-band scavenging exhaust manifolds