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TCI Circlematic Converter for C4 | TrackTheory
TCI · TCI-451520 TCI · TCI-451520 TCI Circlematic Converter for C4 Direct-replacement C4 converter built to tighter tolerances than the part it replaces.
▸ Stall speeds tuned for performance cams, not stock factory maps▸ Tighter TCI tolerances mean less slippage and more consistent lockup▸ Bolt-on fitment to the existing flexplate — no fabrication required$998
incl. GST · ships AU-wide ● 10 in stock
Australian-owned. Stocking circuit racing parts, track-day essentials, and performance upgrades.
TCI Circlematic Converter for C4 $997.53
Add to cart Dispatched in 1-2 business days · 30-day returns
Home Shop Garage Account Specifications
On the spec sheet. Spec sheet coming — contact support for full spec details. Fitment
Will this fit? Fitment data still being indexed for this product. Ask BuildBot for a fit-check against your vehicle.
Why this part
Channel: marketing:TCI Circlematic Converter for C4
Draft:
Cheap converters are built to a price, not a stall curve. TCI matches the Circlematic to real performance engine combinations, so the torque multiplication actually works with your cam rather than against it. At this price point, you're paying for engineering that holds up across repeated heat cycles, not just a single dyno pull.
Pairs well with
Other parts in this build. © 2026 TrackTheory · ABN 33 689 482 504 Built in Adelaide · Shipping AU-wide
