When you order B&B headers you have several options
- 1 5/8" or 1 3/4"
- Carrera 3.2 heat inlets or 964 heat inlets
- 911 heat outlets or 964 heat outlets
Mine are 1 3/4", 964 heat inlets and 911 heat outlets.
w/ that setup you use the stock 964 heat tube as pictured. I have used it on both 964 and 993 vram engines.