2x1 may just slide right inside of the factory metal,which would be alright,but i would box it in with soem flat stock afterwards.try mcmaster carr for the steel. mcmaster.com
2003 banshee ported jugs,piped,yad-ah,yad-ah
1986 tecate KX5 swap
1986 350X(cammed ported piped)sold
1985 250R(310 klemm pipe)
1985 atc70 x 2
other toys
1995 mustang cobra 6 speed twin turbo
1075 rwhp 963 rwtq
9.25@156mph
1992 GMC typhoon 402c.i. LS1
4L80E AWD twin turbo a/c power steering and cruise
963 AWHP
9.40 @ 147 on 4 drag radials