The original rubber intercooler pipes expand under boost, which can cause lag and also fatigue over time which can rupture.
The hard pipe upgrade:
1. Aesthetically pleasing;
2. Is stronger, will not expand under boost or fatigue;
3. Has built-in barb fitting for attaching a boost gauge
4. Comes with silicon joiners, which are more durable than the original rubber joiners, and will withstand must higher boost levels.
All these benefits suit a standard to a highly modified vehicle, with standard front mount intercooler.