A parts counter,
run like a drawing office
Most parts sites are a spreadsheet with a checkout bolted on. The fitment data is a supplier feed nobody has read, the photographs are stock images of the wrong component, and the caveats live in the returns policy.
We built this the other way round. Fitment is modelled on engineering platforms because that is how parts are actually engineered. Every listing carries its cross-references. And when the data is ambiguous, a person reads your VIN.
Six things we hold to
Fitment is the product
Anyone can list a rotor. The value is knowing it fits a 2004 Silverado with the 6-lug hub and not the 8-lug, and saying so on the page rather than in a returns email.
Platforms, not years
Parts fit engineering platforms. A 1967 and a 1972 C10 are the same truck to most of the catalogue; a 1972 and a 1973 are not. Our data is built on that boundary.
Print the numbers
OEM numbers, supersession chains and competitor interchanges are on every listing. If you can read a number off the old part, you can find the new one here.
Say the caveat
“Fits, but not on dually axles” is more useful than “fits”. Every caveat we know about is printed next to the fitment it applies to.
Cores come back free
A prepaid core label is in every box that carries a core charge. There is no time limit and no restocking games — send the old unit back and the deposit is refunded in full.
The VIN is the answer
When the data is ambiguous, seventeen characters resolve it. Send them and a human checks the factory build before your box leaves the shelf.
What we hold
- Makes
- 9
- Nameplates
- 36
- Parts catalogued
- 82
- Returns window
- 90 days
What people say
“I have been buying square-body and Action Line parts for eleven years and this is the first catalogue that knows the difference between a 1972 and a 1973 without me having to explain it. The fitment verdict on the part page has saved me two returns already.”
“They list the casting number on the exhaust manifolds. Nobody does that. I cross-referenced against the one already on my truck and it matched — that is a level of detail I do not see anywhere else, and it is the difference between points and no points.”
“The upholstery came in the correct grain with the right pleat spacing, and the listing warned me to warm it in the sun before fitting. It went on without a fight. Small thing, enormous difference.”
“Ordered a 440 gasket set at 1pm and it was on the bench the next morning. What I actually appreciated was the note about torque-to-yield bolts on the listing — I would have reused mine.”
“S30 parts are genuinely hard to source and they had the L24 water pump on the shelf. The schematic on the listing matched the part exactly, so I could confirm the impeller before ordering rather than after.”
“I asked whether the aluminium radiator would cost me points and they told me straight that it would, and sold me the copper-brass one instead. That is a shop that is not just moving boxes.”
Got a part number?
Search it — we index OEM numbers and competitor interchanges, not just our own.