Originally Posted by Quicksilvers

You will get minimal gains from installing shorty headers. The only shorty headers that would be somewhat worth it are the Z1 headers. Unless you are doing the labor yourself labor will be expensive right side should be 1-2 hours and the left side is a PITB probably 5-6 1/2 hours just depends on how fast you work really. One of the best choices you will ever make on your Z is deciding if you want to install headers because they can be hard to unbolt the evil bolt can be frustrating to remove. The steering shaft and heat shield are hard to remove and it takes time. The only full length longtube headers I would recommend would be the PPS or FI longtube headers.