Best Selling Products — Speed Gems

Best Selling Products

 CH301 Chevy Stovebolt 216/235/261 to Chevy V8 automatic transmission adapter kit — adapter plate, flexplate, starter, and hardware
from $995.00

CH301 CHEVY STOVEBOLT STRAIGHT-6 (216/235/261) TO CHEVY V8 AUTOMATIC TRANSMISSION (700R4)

Speed Gems

Call us for order details +1(763) 767-4480 Materials Included:  (1) ADAPTER PLATE, CHEVY IN-6 TO CHEVY V8 Automatic Transmission(2) SHCS, ¼-28 X 1...

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from $995.00
FO301 Ford Y-block 239/252/272/292/312 to Ford AOD transmission adapter kit — flexplate, adapter plate, starter, and hardware
from $1,350.00

FO301 FORD Y-BLOCK 239/252/272/292/312 TO FORD SMALL BLOCK AOD/C5/C6

Speed Gems

Note: This kit will also work for a C5, C6. If you plan on using a C4, be sure that you have the larger 164 tooth flexplate style bellhousing (Ford...

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from $1,350.00
FO201 Ford FE 352-427 to Ford AOD adapter kit — adapter plate, crank adapter, flexplate, starter, and hardware
from $1,350.00

FO201 FORD FE 352/360/390/406/427 TO FORD SMALL BLOCK AOD/C5/C6

Speed Gems

Note: This kit will also work for a C5, C6. If you plan on using a C4, be sure that you have the larger 164 tooth flexplate style bellhousing (Ford...

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from $1,350.00
CA101 1954–1963 Cadillac 365/390 or Flat-Back 331 to Chevy Automatic Transmission Adapter Kit
from $1,150.00

CA101 1954-63 CADILLAC 365/390 OR “FLAT-BACK” BLOCK STYLE 331 TO CHEVY AUTOMATIC V8 TRANSMISSION

Speed Gems

Materials Included:  (1) Adapter Plate - 1954 & up Cadillac to Chevy Automatic(1) Crank Adapter(1) High Torque mini-Starter(2) HCS 3/8-16 x 3-3...

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from $1,150.00
FO203 Ford FE 352/360/390/406/427 to Ford Modular 6R80/4R70W transmission adapter kit — flexplate, adapter plate, starter, and hardware
from $1,350.00

FO203 FORD FE 352/360/390/406/427 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)

Speed Gems

Materials Included: (1) Adapter Plate - Ford/Lincoln/Mercury to Ford(1) Crank Adapter - Ford/Lincoln/Mercury/Edsel to Ford AOD(1) Flexplate(1) High...

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from $1,350.00
FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)
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from $1,650.00

FO2501 FORD 429/460 TO FORD MODULAR V8 AUTOMATIC TRANSMISSION (6R80/4R70W)

Speed Gems

Release expected 5/31/2026 Call for more info 763-767-4480 USES V8 STYLE 5.0L/5.4L 6R80 *** If you have a 351M or 400, Please see kit # FO...

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from $1,650.00
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FO2701 Ford small block V8 to Ford Modular automatic transmission adapter kit — adapter plate, crankshaft spacer, flexplate, and starter
from $1,100.00

FO2701 FORD SMALL BLOCK V8 TO FORD MODULAR V8 AUTO

Speed Gems

Back and better than ever, our small block Ford to Modular V8 automatic kit is ready to take your project to the next level. With a refined footpri...

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from $1,100.00
FO401 FORD FE 352/360/390/406/427
from $1,350.00

FO401 FORD FE 352/360/390/406/427 TO CHEVY V8 AUTOMATIC TRANSMISSION (700R4)

Speed Gems

Materials Included: (1) Adapter Plate – Ford FE to Chevy(1) Crank Adapter – Ford FE to Chevy(1) Flexplate(1) High-torque mini-Starter(4) SHCS 7/16-...

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from $1,350.00
FO501 FORD 8BA FLATHEAD
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from $1,200.00

FO501 FORD 8BA FLATHEAD (1949-1953) TO CHEVY V8 AUTOMATIC TRANSMISSION (700R4)

Speed Gems

Materials Included:  (1) Adapter Plate – 1949-1953 Ford Flat-head to Chevy Auto.(1) Crank Adapter – 1949-1953 Ford Flat-head to Chevy Auto.(1) Flex...

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from $1,200.00
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Buick 264/322 Nailhead
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from $1,150.00

BU501 1953-1956 Buick 264/322 Nailhead to Chevy Automatic V8 Transmission

Speed Gems

** CALL FOR LEAD TIME DETAILS** Materials Included: (1) Adapter Plate - Buick Nailhead to Chevy(1) Crank Adapter 1953-56 Buick 264/322 Nailhead to ...

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from $1,150.00
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FO10001
from $1,250.00

FO102 FORD 429/460 TO FORD SMALL BLOCK AOD/C5/C6

Speed Gems

Note: Does not work with 351M/400. This kit will also work for a C5, C6.  If you plan on using a C4, be sure that you have the larger 164 tooth fle...

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from $1,250.00
FO501 FORD 8BA FLATHEAD
from $1,200.00

FO1001 FORD Y-BLOCK 239/252/272/292/312 TO CHVEY V8 AUTOMATIC TRANSMISSION (700R4)

Speed Gems

Materials Included: (1) Adapter plate - Ford 239 Y block to Chevy(1) Crank Adapter - Ford 239 Y block to Chevy automatic transmission(1) Top steel ...

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from $1,200.00
MT601 Ford T-5 1983-1993
$325.00

MT601 Ford T-5 1983-1993 to most 1964-82 Ford 3 & 4-speed Bellhousings

Speed Gems

Materials Included: (1) Adapter plate - 1983-1993 Ford T-5 onto most Ford 3 and 4 speed bellhousings(2) FHSCS 7/16-14 x 1-1/2(2) HCS 3/8-16 x 1 3/4...

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$325.00
OL301 1949-1956 Oldsmobile 303/324
from $1,575.00

OL301 1949-1956 Oldsmobile 303/324 to Chevy Automatic Transmission (internally balanced)

Speed Gems

Note: Due to the nature of the Chevy V8 bellhousing being larger than the engine block rear profile and shape, this kit requires modification of th...

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from $1,575.00
S10006 - High-Torque Mini-Starter
$178.99

S10006 - High-Torque Mini-Starter

Speed Gems

This Starter works with the following Speed Gems Kit #'s: · AMC1 - 01· BU1 - 01· BU2 - 01· BU3 - 01· BU4 - 01· CA1 - 01· CA1 - 02· FO2 - 01· FO2 - ...

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$178.99
OL302 1957-1960 Oldsmobile 371/394
from $1,575.00

OL302 1957-1960 Oldsmobile 371/394 to Chevy Automatic Transmission (externally balanced)

Speed Gems

Note: Due to the nature of the Chevy V8 bellhousing being larger than the engine block rear profile and shape, this kit requires modification of th...

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from $1,575.00
BU602 1957-1963 Buick 401/425 Nailhead (w/ 2.90" crank flange) to Chevy Automatic Transmission
from $1,150.00

BU602 1957-1963 Buick 401/425 Nailhead (w/ 2.90" crank flange) to Chevy Automatic Transmission

Speed Gems

Materials Included: (1) Adapter Plate - Buick Nailhead to Chevy(1) Crank Adapter-Inner(1) Crank Adapter-Outer(1) Torque Converter Drive Plate(1) Fl...

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from $1,150.00
OL303 1961-1964 Oldsmobile 394 with "Slim-Jim"
from $1,200.00

OL303 1961-1964 Oldsmobile 394 with "Slim-Jim" to Chevy Automatic Transmission (166-tooth externally balanced)

Speed Gems

Note: You will be re-using the stock Slim-Jim flywheel with this kit. Remove the original drive plate that is held onto the stock flywheel with 5/1...

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from $1,200.00
PA201  1955-1956 Packard 320/352/374  V8 to Chevy 700R4/Automatic Transmission
from $1,350.00

PA201 1955-1956 Packard 320/352/374 V8 to Chevy 700R4/Automatic Transmission

Speed Gems

We’re proud to continue offering these specialized kits, though availability may occasionally be limited due to lower demand.  Please allow 4–8 wee...

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from $1,350.00
ME401 Mercedes 5 & 6-cylinder
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from $1,450.00

ME401 Mercedes 5 & 6-cylinder (1987 & Newer) Diesel Engine (w/ 15-degree) to Chevy Manual Transmission

Speed Gems

15 degree offset it to angle the engine more than from the factory for tighter packaging in shorter engine bays. Materials Included: (1) Adapter ...

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from $1,450.00
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MT301  216/235 with 3-speed Chevy Bellhousing 1954 and Older to Chevy S10 T5 1984-1992
$295.00

MT301 216/235 with 3-speed Chevy Bellhousing 1954 and Older to Chevy S10 T5 1984-1992

Speed Gems

Materials Included: (1) Adapter plate - 1984-1992 Chevy S10 T5 to 1954 or older Chevy 216/235 with Chevy 3-speed Bellhousings(4) FHSCS 3/8-16 x 1-1...

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$295.00
FO901 FORD SMALL BLOCK 221/260/289 1964 & OLDER TO FORD SMALL BLOCK AOD/C5/C6
from $1,250.00

FO901 FORD SMALL BLOCK 221/260/289 1964 & OLDER TO FORD SMALL BLOCK AOD/C5/C6

Speed Gems

Please call for availability +1 763-767-4480 Note: This kit will also work for a C5, C6. If you plan on using a C4, be sure that you have the large...

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from $1,250.00
MT101 Chevy 3 & 4-speed Bellhousings
$275.00

MT101 Chevy 3 & 4-speed Bellhousings (most) to Chevy S10 T5 1984-1992

Speed Gems

Materials Included: (1) Adapter plate - 1984-1992 Chevy S10 T5 to most Chevy 3 & 4-speed Bellhousings(4) SHCS 1/2-13 x 2 This BELLHOUSING ADAP...

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$275.00
PA101  Packard 288/327/359 Straight-8 to Chevy Automatic V8 Transmission
from $1,350.00

PA101 Packard 288/327/359 Straight-8 to Chevy Automatic V8 Transmission

Speed Gems

We’re proud to continue offering these specialized kits, though availability may occasionally be limited due to lower demand.  Please allow 4–8 wee...

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from $1,350.00
ME101  Mercedes OM616 & OM617  5-cylinder Diesel Engine to Chevy Automatic V8 Transmission
from $1,150.00

ME101 Mercedes OM616 & OM617 5-cylinder Diesel Engine to Chevy Automatic V8 Transmission

Speed Gems

Materials Included:  (1) Adapter plate - Mercedes 5 cylinder diesel to Chevy(1) Crank Adapter - Mercedes 5 cyl diesel to Chevy 350/400(1) Flexplate...

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from $1,150.00
EC101  ECOTEC Naturally Aspirated (i.e. Olds Alero) to Chevy Automatic V8 Transmission (700R4/TH350/TH400)
from $1,250.00

EC101 ECOTEC Naturally Aspirated (i.e. Olds Alero) to Chevy Automatic V8 Transmission (700R4/TH350/TH400)

Speed Gems

Materials Included: (1) Adapter Plate - ECOTEC to Chevy(1) Crank Adapter(1) Torque Converter Drive Plate(2) SHCS M12-1.75 x 35(4) SHCS M12-1.75 x 5...

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from $1,250.00
WMO501 1924-64 CHRYSLER FLATHEAD STRAIGHT-6 TO CHEVY V8 AUTOMATIC TRANSMISSION
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from $1,350.00

WMO501 1924-64 CHRYSLER FLATHEAD STRAIGHT-6 TO CHEVY V8 AUTOMATIC TRANSMISSION

Speed Gems

CHRYSLER FLATHEAD 6 TO CHEVY AUTO. ENGINE APPLICATION YEARS/CID CHRYSLER/DODGE/PLYMOUTH FLATHEAD 6 CYL 201,218, 230, 251, 265 CI 1933-1971 ...

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from $1,350.00
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OL101  1949-1956 Oldsmobile 303/324 to Chevy Manual Transmission
from $1,575.00

OL101 1949-1956 Oldsmobile 303/324 to Chevy Manual Transmission

Speed Gems

NOTE: Due to the nature of the Chevy V8 bellhousing being larger than the engine block rear profile and shape, this kit requires modification of th...

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from $1,575.00
FO601 FORD 429/460 TO CHEVY V8 AUTOMATIC TRANSMISSION (700R4)
from $1,350.00

FO601 FORD 429/460 TO CHEVY V8 AUTOMATIC TRANSMISSION (700R4)

Speed Gems

Materials Included: (1) Adapter plate - Ford to Chevy auto(1) Block Plate - Ford 429/460 to Chevy auto(1) Starter, Short Gear, .500" (1) Torque con...

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from $1,350.00
BU101  Buick Straight-8  233/248/263 w/ orig. Manual Transmission to Chevy V8 Automatic
from $1,250.00

BU101 Buick Straight-8 233/248/263 w/ orig. Manual Transmission to Chevy V8 Automatic

Speed Gems

Note: When replacing your transmission with a more modern unit, a modern axle may be required that does not utilize a torque tube.  Materials Incl...

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from $1,250.00
CA102 1954-63 CADILLAC 365/390 OR “FLAT-BACK” BLOCK STYLE 331 TO CHEVY MANUAL TRANSMISSION
from $1,400.00

CA102 1954-63 CADILLAC 365/390 OR “FLAT-BACK” BLOCK STYLE 331 TO CHEVY MANUAL TRANSMISSION

Speed Gems

*This kit includes everything you will need to mate your 365 or 390 to a manual transmission. There is no need to buy additional parts when you ord...

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from $1,400.00
Dodge Hemi Hellcat 6.2L and 6.4L supercharged V8 engine — compatible with DO103 Chevy 4L80E transmission adapter kit
from $1,375.00

DO103 Designed Specifically for the Dodge Hemi Hellcat 6.2L & 6.4L to Chevy 4L80E/Automatic Transmission

Speed Gems

*This Kit allows for using the original factory starter in the stock location, while retaining the factory flexplate, and doesn't require any block...

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from $1,375.00
MT801  Ford T5 1983-1993 to Chevy Bellhousing
$325.00

MT801 Ford T5 1983-1993 to Chevy Bellhousing

Speed Gems

Materials Included: (1) Adapter plate - Chevy bellhousing to Ford T5(2) HCS 3/8-16 x 1-1/2(2) Flat Washer 3/8(2) FHSCS 1/2-13 x 1-1/2(4) SHCS 7/16-...

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$325.00
OL301 1949-1956 Oldsmobile 303/324
from $1,650.00

CA401 1949-54 CADILLAC 331 W/ “EXTENDED BELLHOUSING” BLOCK STYLE TO CHEVY AUTOMATIC V8 TRANSMISSION

Speed Gems

;Materials Included: (1) Adapter Plate - Olds/Cadillac 1949-1964 to Chevy(1) Crank Adapter - Olds/Cadillac 1949-1964 to Chevy(1) Torque Converter D...

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from $1,650.00
CH501 1955-1956 Chevy V8 to late model transmission starter plate kit installed — flexplate, starter, and bellhousing
$225.00

CH501 STARTER PLATE KIT FOR 1955-56 CHEVY V8 TO LATE MODEL TRANSMISSION

Speed Gems

Materials Included:  (1) Adapter Plate  (1) Hardware Kit Please Note: WILL ALSO WORK IN LATE MODEL APPLICATIONS WHERE THE STARTER MOUNTING THREADS...

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$225.00
MT701  Ford T-5 1983-1993 to Ford Flathead with stamped-steel Bellhousing
$295.00

MT701 Ford T-5 1983-1993 to Ford Flathead with stamped-steel Bellhousing

Speed Gems

Materials Included: (1) Adapter plate - Mercury/Ford Flathead to Ford T-5(2) FHSCS 7/16-14 x 1-1/2(2) SHCS 7/16-20 x 2(2) SHCS 7/16-14 x 1-1/4   Th...

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$295.00