Do I need to use preformed tubs or can I fabricate from sheet metal?
Documented on the Ford Mustang build
Published February 26, 2026
You can do either.
Full Answer
You can do either. Preformed tubs save time and fitment work but can be more expensive and still require trimming. Fabricating from sheet metal is more labor-intensive but allows a fully custom shape for clearance and appearance.
Documented In This Build
Related Knowledge
What welding technique is recommended?Will this modification affect vehicle legality or safety?How much clearance should I allow for larger wheels/tires?How should I protect the new metal from rust?How do I prevent warping when welding thin sheet metal?What wheel/tire sizes can this modification accommodate?How much extra tire/wheel clearance can I expect?How difficult is this for someone with limited metalworking experience?
Related Parts
MIG welding wire (ER70S-6, 0.030-0.035" spool)
$30
Grinding / flap discs (pack)
$20
18 gauge cold-rolled steel sheet (for tubs)
$60
Preformed wheel tubs (alternative)
$250
Seam sealer / panel adhesive
$10
Weld-through primer / zinc-rich primer
$25
Automotive body filler (Bondo or equivalent)
$15
Self-tapping screws / rivets & nutserts (fasteners)
$10
Related Tools
Hammer and dolly set
Spot weld cutter / drill
Angle grinderDeWalt DWE402
Sheet metal brake / metal folderEastwood Leaf Break (or equivalent)
Measuring tools and markers (tape, scribe, straightedge)
Clamps and cleco fasteners
MIG welderLincoln Electric LN-140 (or equivalent)
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