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SFI Flexplates
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Manufactured in the USA on state-of-the-art CNC equipment, ATI's Flexplates are created from
SFI-spec steel and are SFI 29.1 Certified and are double MIG/TIG welded for additional
strength and lasting precision pass after pass. Each ATI
flexplate is manufactured and toleranced from OEM drawings
to ensure a precise fit and location.
Each plate is quality inspected to exceed the flatness
and run-out tolerances of the OEM units and is precision
balanced on Hines digital equipment with a resolution
of 1/10 oz-in.
Starters for ATI Flexplates
Crank Adapters for Extra
Thick Midplates
Bolt Pattern & Tooth Count
Application |
Tooth Count |
Bolt Circle |
GM |
153 |
10.750" |
GM |
168 |
11.500" |
FORD |
157 |
10.500" |
FORD |
164 |
11.4375" |
|
Chevy Late Model 305 / 350
Late model
bolt-on crankshaft flange -
'86 and up one-piece rear seal [12]
| Engine Group |
Teeth |
Balance |
Part # |
Price |
|
| 305
/ 350 |
153 |
INT |
915533 |
$239.00 |
|
- Uses ATI #951479-6 flexplate to crank bolts.
Chevy Small Block V8 [12]
| Engine Group |
Teeth |
Balance |
Part # |
Price |
|
283
/ 302 / 327 / 350
Early 2 Piece Seal |
153 |
INT |
915539 |
$229.00 |
|
168 |
INT |
915541 |
$239.00 |
|
| 10 DP [10] |
139 |
INT |
915545 |
$261.00 |
|
| 400 |
168 |
EXT |
915561 |
$229.00 |
|
- Special starter required. Order #915546.
- Uses ATI #951479-6 flexplate to crank bolts.
Chevy Big Block V8 [12]
| Engine Group |
Teeth |
Balance |
Part # |
Price |
|
'70
- '90 454
454 / 502 Mark IV |
168 |
INT |
915541 |
$239.00 |
|
168 |
EXT |
915551 |
$239.00 |
|
| '91
& up
Gen V 454 |
168 |
INT |
915541 |
$239.00 |
|
| '91
& up 572,
Gen V - 454 HO / 502 HO |
168 |
INT |
915541 |
$239.00 |
|
| 396 / 427 |
168 |
INT |
915541 |
$239.00 |
|
| '70 & Up 396 - 502 10
DP [10] |
139 |
INT |
915545 |
$269.00 |
|
- Special starter required. Order #915546.
- Uses ATI #951479-6 flexplate to crank bolts.
Chevy LS & LT Applications
| Engine Group |
Teeth |
Int. Balance |
Price |
|
| LS1/2/6/7 & L89 WITH
6 BOLT CRANK (Race only) [12] |
168 |
915733 [7] |
$349.00 |
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| LT1 / LT4 / ZL1 Z-BODY
CTS-V W/LSA - LSX 8-Bolt Crank [12] |
168 |
915737 [7, 11] |
$369.00 |
|
- LS flexplates sold only as a kit. Includes
flexplate, crank adapter and bolts. Requires
a custom aftermarket converter. Must have
- For use with 8-bolt cranks
- Uses ATI #951479-6 flexplate to crank bolts.
Oldsmobile and Pontiac Applications
| Application |
Engine Group |
Teeth |
Balance |
Part # |
Price |
|
| Oldsmobile [12] |
'64 - '67 V8
300 / 400 / 425 |
166 |
INT |
915562 |
$239 |
|
166 |
EXT |
915563 |
$289 |
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All V8 including
Diesel |
166 |
INT |
915564 |
$239 |
|
166 |
EXT |
915565 [4] |
$239 |
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| Pontiac V8 [13] |
400 / 455 |
166 |
INT |
915567 [14] |
$240 |
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- 25.0 oz in
- 12 Uses ATI #951479-6 flexplate to crank bolts.
- Uses ARP bolt #200-2904 flexplate to crank
bolts.
- Flexplate has 2.75” center hole. For cranks
with a 2.5” register, call ATI for an adapter
Chrysler V8 - with ATI Adapters
to GM Powerglide, TH350 & TH400 Transmissions
| Application |
Engine Group |
Teeth |
Balance |
Part # |
Price |
|
| 6 Bolt Crank |
All wedges |
130 |
INT |
915650X [6] |
$240.00 |
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| 8 Bolt Crank |
HEMI |
130 |
INT |
915660X [6] |
$239.00 |
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- Replacement parts require crank adapter for
proper use. ATI Chrysler adapter flexplates
require the use of 10 3/4” bolt circle only with
GM convertes.
Dodge Viper - 8-Bolt crank to
GM
| Application |
Engine Group |
Teeth |
Part # |
Price |
Purchase |
| Viper V10 ('05–'17) 8 Bolt Crank |
HEMI |
143 |
915666 |
$275.00 |
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Chrysler V8 SFI - 8-Bolt crank new style HEMI standard replacement
| Application |
Engine Group |
Part # |
Price |
|
| '05 - '08 300C, Charger & Magnum |
5.7L &
6.1L |
|
$349.00 |
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| '05 - '07 Jeep Grand Cherokee [8] |
3.7L &
6.1L
-- NOT 5.7L -- |
|
$349.00 |
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| HEMI - Gen III to 904/727 Trans, Includes 10.9 Spec Crank Bolts |
5.7L , 6.1L, 6.5L |
|
$159.00 |
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- All external balance flexplates must be on
the crank for balancing or match-balanced
to the unit that was originally balanced with
the crank.
- Cast crank only - 41.95 oz. in.
- 25.0 oz in
- Replacement parts require crank adapter for
proper use. ATI Chrysler adapter flexplates
require the use of 10 3/4” bolt circle only with
GM converters.
- LS flexplates sold only as a kit. Includes
flexplate, crank adapter and bolts. Requires
a custom aftermarket converter. Must have
an engine mounted transmission. Flexplate
for kit #915733 is #915543. For 1999-2000
iron block, iron head 6.0L LQ4 truck cranks,
use #915543 plate only and OEM length
crank bolts.
Flexplate for kit #915737 is #915537...$209.
- Does not fit 5.7L Jeep Grand Cherokee.
OEM converter bolt holes require longer
bolts.
- Special starter required. Order #915546.
- For use with 8-bolt cranks
- Uses ATI #951479-6 flexplate to crank bolts.
- Uses ARP bolt #200-2904 flexplate to crank
bolts.
- Flexplate has 2.75” center hole. For cranks
with a 2.5” register, call ATI for an adapter
Ford Flexpate Kits
Ford Flexplate kits include flexplate, CNC-machined
crank piloted spacer and crank bolts ATI flexplates fit aftermarket converters only. |
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915722 - Flexplate, spacer & crank
bolts |
APPLICATION |
FLEXPLATE KIT
INCLUDES FLEXPLATE, CRANK SPACER, CRANK BOLTS |
FLEXPLATE ONLY |
CRANK
ADAPTER |
CRANK
BOLT SET |
ENGINE |
TRANS |
TEETH |
INT.
BALANCE |
PRICE |
INT.
BALANCE |
PRICE |
EXT.
BALANCE |
PRICE |
PART # |
PRICE |
PART # |
PRICE |
429 / 460 |
C6
E4OD |
164 |
915720 |
$349.00 |
915700 |
$239.00 |
915701 [1] |
$269.00 |
915611 |
$86.00 |
950143 |
$37.73 |
FE
332 / 428 |
C6
E4OD |
184 |
915722 |
$349.00 |
915702 |
$240.00 |
-- |
-- |
915611 |
$86.00 |
950143 |
$37.73 |
289 / 302
351 / 400 |
C6
E4OD |
164 |
915724 |
$299.00 |
915704 |
$239.00 |
915705 |
$2390.00 |
915601 |
$84.00 |
950142 |
$31.00 |
289 / 302
351 / 400 |
C4
AOD |
164 |
915727 |
$299.00 |
915707 |
$239.00 |
915708 [3] |
$239.00 |
915602 |
$77.00 |
951471-6 |
$19.95 |
289 / 302 |
C4 |
157 |
915730 |
$349.00 |
915710 |
$290.00 |
|
$239.00
$249.00
|
915602 |
$77.00 |
951471-6 |
$19.95 |
| Ford Mod Motor with GM Transmission |
4.6-5.4L
MOD MOTOR |
GM |
164 |
915735 [6] |
$299.00 |
915719 |
$239.00 |
-- |
-- |
915607 |
$84.00 |
950144 |
$18.95 |
COYOTE 5.0L 8-BOLT |
GM |
164 |
915738 [6] |
$349.00 |
915719 |
$239.00 |
-- |
-- |
915607A |
$84.00 |
951378-8 |
$47.31 |
GODZILLA 7.3L 8-BOLT |
GM |
164 |
915740 [6] |
$349.00 |
915719 |
$239.00 |
-- |
-- |
915608 |
$84.00 |
951378-8 |
$47.31 |
- 24 oz. in. - 460 truck only with D9TP-6375-AA or E7TP-6375-AA
OEM flexplates.
- 28.8 oz. in. OEM flexplate. For reference, the OEM weight
is 5 1/8” x 5/8” x 5/16” thick.
- 28.2 oz. in. All 289-351C-351W- 400 and 302 through 1980.
OEM flexplate is 4 1/4” x 3/4” x 3/8”
thick.
- 50.0 oz. in. ‘81 & up 5.0 L only. OEM flexplate
weight is 4 1/4”x 7/8” x 7/16” thick.
- Flexplate ONLY part # - not the full kit for noted External Balance flexplates
- These kits are for Ford motors with GM Transmissions only
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ATI Ford Flexplates with 164 teeth have an 11-7/16” bolt circle, and flexplates with 157 teeth have a 10-1/2” bolt circle for Ford converters. Both have factory installed 10-3/4” & 11-1/2” bolt circles for GM converters
but only the 10-3/4” bolt circle is usable for the 157 tooth flexplates due to ring gear interference. The 184
tooth FE flexplates are 11-7/16” Ford bolt circle only! ATI Ford Flexplates are flat. They will accommodate
only those converters where the drive pad is ABOVE the converter body. |
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Superplate® High HP Flexplates
Now available: 166 tooth flexplates to fit all
popular size SFI 6.3 spec cans! |
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ATI has developed the Superplate line of Flexplates to keep up with rampant HP gains made each year. Superplates
are manufactured from a material with a 90,000 lb. tensile and 80,000 lb. yield strength to withstand thousands
of cycles. Superplates are laser machined to avoid heat and stress that stamping inflicts on the part. The crank
bolt holes and center hole are bored to exacting tolerances using ATI’s in-house CNC machines. The Superplate
uses the correct “grip length” crank bolts as dowels to prevent the plate from moving under high torque conditions.
Why is a flexplate necessary? While manufacturing strives for precision, actually achieving it can be very difficult.
Therefore, believing that a crankshaft will be 100% in the center of the main line of the engine and thinking
that everything will line up perfectly from the damper to the input shaft of the transmission is a fallacy. Because
of the imperfect process, the flexplate needs to be flexible in order to make up for the “allowable” tolerances of
the various part manufacturers.
ATI’s flexplate design is derived from a vast array of auto manufacturers, including big names like Lamborghini,
Mercedes Benz, Bugatti, as well as 30 years of our own experience. A billet or thicker flexplate does not flex and
therefore cannot absorb the “allowable tolerances” and that, in turn, can cause damage.
ATI Superplates are neutral balanced for use
in internally balanced engines and exceed SFI 29.1 &
29.2 ratings.
Starters for ATI Flexplates
Crank Adapters for Extra
Thick Midplates |
General Motors - For internally balanced
engines.
Superplates require specific bolts for each application - consult your ATI technician for assistance.
| Bolt Pattern |
Teeth |
Bolt Size |
Part # |
Price |
|
| Chevy SB - High HP - standard holes |
168 |
Standard |
915544 |
$239 |
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Chevy 6 bolt - 7/16” bolts (standard replacement)
2-piece rear seal crank flange |
168 |
7/16" |
915554 |
$309 |
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Chevy 6 bolt - 7/16” bolts (needs special starter)*
2-piece rear seal crank flange |
139
10DP |
7/16" |
915555* |
$309 |
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Chevy 6 bolt for 1/2” bolts
2-piece rear seal crank flange |
168 |
1/2" |
915548 |
$309 |
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Chevy 6 bolt for 1/2” bolts -
2-piece rear seal
crank flange |
139
10DP |
1/2" |
915556 |
$309 |
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Chevy - Chrysler 8 bolt for 1/2” bolts
(uses standard Chevy starter) |
168 |
1/2" |
915547 |
$309 |
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* needs special starter
Chrysler V8 - For internally
balanced engines
| Application |
Teeth |
Bolt Size |
Balance |
Part # |
Price |
|
| 6 Bolt Crank |
130 |
1/2" |
INT |
915549 |
$309 |
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| 8 Bolt Crank (Chevy starter) [1] |
168 |
1/2" |
INT |
915547 |
$309 |
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[1] Fits Chevy
motors with aftermarket crank with 8-bolt Chrysler flange |
Flexplate Hardware Kits
| Flexplate
Bolts |
Part
Number |
Price |
| FORD 289-302-351 ALL 400-C6 /
400 164 TEETH |
950142 |
$31.00 |
| FORD 289-302HO-351 ALL 400-C6
/ 400 164 & 157 TEETH |
950143 |
$37.73 |
| FORD COYOTE - FLEX TO CRANK - M10
X 1.00 X 35MM, CLASS 10.9 HHCS - (Pack of 8) |
951378-8 |
$47.31 |
| FORD MOD AND LATE HEMI |
950144 |
$18.95 |
LATE MODEL HEMI 8 BOLT - 10MM
X 1.00 X 20MM, CLASS 10.9 - (Pack of 8)
|
951372-8 |
$11.00 |
| Flexplate
Hardware - High HP
use with ATI flexplate and crank adapter |
Part
Number |
Price |
MOPAR (Except HEMI) & FORD
SB 7/16 - 20 X 1 1/4”, .700 GRIP, 12 PT (Pack
of 6)
|
951034-6 |
$66.39 |
| MOPAR HEMI 1/2 - 20 X 1-1/4”,
.700 GRIP, 12 PT (Pack of 8) |
951035-8 |
$92.93 |
| FORD 429-460 7/16 - 20 X 1”,
.200 GRIP, 12 PT (Pack of 6) |
951036-6 |
$27.32 |
FLEXPPLATE TO CRANK 1/2 - 20 x 1-1/4”, .225 HEAD,GRADE 8 (Pack of 8)
|
951435-8 |
$21.37 |
| Crankshaft to Flexplate
Spacers for Lock-Up |
Part
Number |
Price |
CHEVY 6-BOLT - SPRING STEEL
|
915648 |
$19.95 |
| CHRYSLER 8-BOLT - SPRING STEEL |
915649 |
$19.95 |
| Flexplate
Hardware - High HP
use without crank adapter |
Part
Number |
Price |
| FLEXPLATE TO CRANK 1/2 - 20 x
13/16” - Pack of 6 |
951058-6 |
$57.60 |
| FLEXPLATE TO CRANK 1/2 - 20 x
1” - ,450 GRIP - 12 PT EXTREME DUTY - Pack
of 6 |
951059-6 |
$48.44 |
| FLEXPLATE TO CRANK 1/2 - 20 x
1” - ,450 GRIP - 12 PT EXTREME DUTY - Pack
of 8 |
951059-8 |
$64.58 |
HEMI OR 8-BOLT CRANKS WITH HD MACHINED ON-SIZE FLEXPLATES
1/2 - 20 x 13/16” (modified to 0.722" length) - Pack of 8 |
951058M-8 |
$106.17 |
CHEVY FLEXPLATE TO CRANK FOR USE WITH
CHEVY / OLDSMOBILE CRANKS
7/16 - 20 x 11/16” - Pack of 6
|
951479-6 |
$22.51 |
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