Non aluminized tubing and U beds from your local exhaust supply warehouse
Note: Ceramic coatings will not adhere to aluminized steel pipe
1"  strap steel - local metal supply place or your scrap pile

Full length Street pipes with muffler inserts are fabricated from:
3.5" tubing
1ea 3.5"  U bend
2ea Pertronix 3.5" muffler inserts tack welded into the pipes
2ea 3" to 3.5" stainless steel conical adapters
2ea stainless steel V-Band clamps
2ea 3" Stainless flange

WFO Race Pipes are fabricated from:
3" pipe
2ea 3" flange adapters
1ea 3" U-bend

3" Stahl side pipe headers

Burns Stainless Steel
6ea 3" flanges
2ea 3.5" V-band clamps
2ea 3" to 3.5" conical adapters