Nissan 240SX Performance Modification/KA24DE and KA24E/Header/header reviews
Several Brands of Headers are Available for the 240SX Including:
EGR inlet on the headers didn't line up well with the EGR pipe running from behind the engine. Had to extend the o2 sensor wire. The steering bolt scraps the headers causing car to "catch" briefly. Irritating, but you can notice a reasonable power gain.
The Greddy header is a 4-1 short header design that bolts to a secondary "downpipe" that ends at the location of the stock cat. These headers are prone to cracking and welds giving up around the collector and the flange on the head. These headers are very loud and not worth the money in my opinion. When mine broke I went with the obx 4-2-1 design.
Dyno Results of the DC Sports 4-2-1 Header on the KA24DE.