GM LS, LT, SBC and BBC on the engine side, to the BMW 8HP70, 8HP75 and 8HP76 — and the 6HP28 or Ford 6R80 as alternative paths. Rear- and all-wheel drive, universal and BMW E-chassis versions.

Think of it as the GM engine side of GA3 with the BMW transmission side of GA6.

A gas 6HP26/28 can be built to order, roughly a one- to two-month lead. On this kit it needs a CANTCU to control the transmission and interface to the engine's ECU, since there is no stock BMW engine in the car to talk to it.

The 8HP70 and 6HP26/28 are comparable in strength — we lead with 8HP because it is more common and easier to source, not because it is stronger.

Stock cores commonly handle 600–800 lb-ft. Built units with upgraded clutch packs and billet internals go past 1000 lb-ft, with proven seven- and eight-second quarter-mile passes behind them.

Factory torque ratings: 8HP70 516 lb-ft · 8HP75 551 · 8HP76 560 · 8HP90 664 · 8HP95 700 · 6HP28 516 · 6R80 590.

Same family of answers as our BMW-to-BMW 8HP kit: E-series ATC300 and ATC350 are directly compatible; the F-series ATC35L fits but uses an actuation motor most controllers will not drive; a G-series unit needs a mounting-flange adapter; ATC500, ATC700 and 45L are too large for the E9x and E8x tunnel.

All-wheel drive on this kit is only compatible with a transfer case setup — ask us before you commit to parts.

An OE shrouded starter needs a minor bellhousing modification. An aftermarket unshrouded starter needs none.

Flexplate: OE GM 3-bolt 11-1/16″, 3-bolt 10-3/4″, or 6-bolt 11-1/2″. Both short-crank and long-crank engines are covered with no changes on your part — the correct crank pilot adapter is selected from your engine choice at checkout.

The OE BMW N63 8HP converter is the straightforward path.

Stock torque converters can also be modified by shops such as Circle D, Florida Torque Converter, TCR of Las Vegas and Precision Hampton.

On the BMW chassis versions the OE two-piece E9x and E8x shafts fit with no modification, and the E6x needs a minor one. M3 two-piece shafts work as well. OE BMW flex-disc shafts mate to the 6HP and 8HP output flanges.

The OE cooler is neither recommended nor compatible, which is why the kit includes the delete hardware rather than treating it as an upgrade. Run an AN cooler core with an inline thermostat instead — our suggestion for most builds is a 19-row core ahead of the radiator with a 165 °F thermostat.

The kit covers the transmission end: the cooler adapter, an 8AN PTFE line kit with fittings, reducers, and the block-off for the OE cooler.

By measuring the port, not by reading it off the transmission model. Six engines wear more than one port depending on the transmission behind them, so the model number genuinely cannot answer it.

The names are caliper readings on the port itself: 18.5 mm and 17 mm are bore seals — a plain round bore, O-ring sealing radially against the wall. 14 mm and 12 mm are face seals — a stepped port replicating the OEM formed hardline tip, with the O-ring squeezed axially against a machined face by the retaining bracket. You can tell the two families apart at a glance.

Not sure? Send a photo with a caliper on it. That takes us two minutes and saves you a return.

Complete. Billet CNC body, port O-rings, mounting hardware, ending in two ORB8 female ports. There is no bare version of this part.

What you choose is which ORB8-to-AN male fitting arrives pre-installed — 6AN, 8AN or 10AN — or leaving the ports open if you already run your own ORB8 fittings. Open ports are a legitimate choice, not a downgrade. The mount bolt is never something you pick; the right hardware ships either way.

We stock and sell CANTCU, Turbo Lamik and MaxxECU for the 8HP. Coverage by transmission generation:

• CANTCU — Gen 1, 2 and 3, with the correct BMW-based TCU calibration file. Dodge and other 8HP TCUs can be flashed to BMW software where compatible.
• Turbo Lamik — Gen 1 and 2 directly; a Gen 3 transmission needs a Gen 2 TCU substituted in place of the Gen 3 unit.
• MaxxECU — Gen 1 only.

Other 8HP controllers exist and some are good — we do not stock them, so they will never appear as an option here, but we are happy to talk one through. If you read a different generation list on our old FAQ, this one supersedes it.

The included shifter adapter is designed for the BMW F-Series electronic shifter. Two F-series shifters fit, both with the 10-pin front connector: 61319296896 (F2x, F3x, F8x) and 61319296904 (F0x, F1x).

Premium DCT-branded sequential short and long handle shifters are also available. Other F, G, Dodge or aftermarket shifters may work depending on your standalone TCU, but that needs a custom adapter — ask first rather than after.

Same family as our other BMW 8HP kit: tight but workable, with bubble removal available if you want a narrower profile. Because this combination varies more by chassis than the BMW-engine kits do, tell us the car and we will tell you what the builds before yours needed.