Toll Free Order Line: 1-877-298-5039
ATI Performance Products logo Products CW3 Converter Welding Equipment Tech Support News Order
Corner Spacer
 
 
spacer
Home > Products > Flexplates

SFI Flexplates


 

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 LS & LT Applications

ENGINE GROUP
TEETH
INT. BALANCE
PRICE
LS1/2/6/7 & L89 WITH 6 BOLT CRANK (Race only)
168
915733 [7]
$339.00
LT1 / LT4 / ZL1 Z-BODY CTS-V W/LSA - LSX 8-Bolt Crank
168
915737 [7, 11]
$349.00


Chevy Applications

APPLICATION
ENGINE GROUP
TEETH
INT. BALANCE
PRICE
EXT. BALANCE
PRICE
Late model bolt-on crankshaft flange - '86 and up one-piece rear seal [12]
305 / 350
153
915533
$210.00
--
--
168
915534
$197.00
--
--
Small Block V8
[12]
283 / 302 / 327 / 350
Early 2 Piece Seal
153
915539
$238.00
--
--
168
915541
$175.00
--
--
10 DP
139
915545 [10]
$230.00
--
--
400
168
--
--
915561
$196.00
Big Block V8
[12]
'70 - '90 454
454 / 502 Mark IV
168
396 / 427
USE
#915541
FOR INTERNAL
BALANCE
$175.00
915551
$210.00
'91 & up
Gen V 454 [2]
168
$175.00
--
--
'91 & up [3] 572
Gen V - 454 HO / 502 HO
168
$175.00
--
--
10 DP
139
915545 [10]
$230.00
--
--


Oldsmobile and Pontiac Applications

APPLICATION
ENGINE GROUP
TEETH
INT. BALANCE
PRICE
EXT. BALANCE
PRICE
Oldsmobile [12]
'64 - '67 V8
300 / 400 / 425
166
915562
$311.00
915563
$309.00
Oldsmobile [12]
All V8 including Diesel
166
915564
$234.00
915565 [4]
$261.00
Pontiac V8 [12]
400 / 455
166
915567
$206.00
915568 [5, 14]
$223.00


Chrysler V8 - with ATI Adapters to GM Powerglide, TH350 & TH400 Transmissions

APPLICATION
ENGINE GROUP
TEETH
INT. BALANCE
PRICE
6 Bolt Crank
All wedges
130
915650X [9]
$212.00
8 Bolt Crank
HEMI
130
915660X [9]
$209.00



Chrysler V8 HEMI

APPLICATION
ENGINE
PART #
PRICE
'05 - '07 300C, Charger & Magnum
5.7L & 6.1L
$189.00
'05 - '07 Jeep Grand Cherokee [8]
3.7L & 6.1L
-- NOT 5.7L --
$189.00
HEMI - Gen III to 904/727 Trans, Includes 10.9 Spec Crank Bolts
5.7L & 6.1L
$142.00
  1. Externally balanced flexplates must be on the crank for balancing or match balanced to the unit that was originally balanced with the crank.
  2. Cast crank only - 41.95 oz. in.
  3. Forged crank only - 42.54 oz. in.
  4. 25.0 oz in
  5. No weight. Imbalance is accomplished by lightening one side of the flexplate.
  6. 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.
  7. LS flexplates sold only as a kit. Includes flexplate, crank adapter and bolts. Requires a custom aftermarket converter. Must have an engine mounted transmission.
  8. Does not fit 5.7L Jeep Grand Cherokee. OEM converter bolt holes require longer bolts - included. Use ATI #951037-8 flexplate to crank.
  9. Replacement parts: Be sure to specify the date of original order. Parts shipped prior to January 2007 have different dimensions and part numbers (non-X numbers). Flexplate to crank bolts: for 6-bolt crank, use #951034-6; for 8-boltcrank, use #951034-8.
  10. Special starter required. Order pt.#915546.
  11. For use with 8-bolt cranks
  12. Uses ATI #951479-6 flexplate to crank bolts
  13. Uses ARP bolt #200-2904 Flexplate to crank
  14. 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.
 
915722 - Flexplate, spacer & crank bolts


ENGINE TRANS
TEETH
INT. BALANCE
PRICE
EXT. BALANCE
PRICE
429 / 460 C6 - E4OD
164
915720
$320.00
915701 [1, 5]
$236.00
FE 332 / 428 C6 - E4OD
184
915722
$336.00
915703 [2, 5]
$263.00
289 / 302 / 351 / 400 C6 - E4OD
164
915724
$319.00
915705 [3, 5]
$240.00
289 / 302 / 351 / 400 C4 - AOD
164
915727
$298.00
915728 [3]
915708 [4, 5]
$311.00
$236.00
289 / 302 C4
157
915730
$293.00
915711 [3, 5]
915712 [4, 5]
$230.00
$230.00
8-bolt 4.6-5.4L Mod Motor
with GM Transmission
GM
164
915735
$319.00
--
--
COYOTE 5.0L 8-BOLT GM
164
915738
$299.00
--
--

  1. 24 oz. in. - 460 truck only with D9TP-6375-AA or E7TP-6375-AA OEM flexplates.
  2. 28.8 oz. in. OEM flexplate. For reference, the OEM weight is 5 1/8” x 5/8” x 5/16” thick.
  3. 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.
  4. 50.0 oz. in. ‘81 & up 5.0 L only. OEM flexplate weight is 4 1/4”x 7/8” x 7/16” thick.
  5. Flexplate ONLY part # - not the full kit for noted External Balance flexplates
  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.

 



Superplate® High HP Flexplates





Now available: 166 tooth flexplates to fit all popular size SFI 6.3 spec cans!
  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 bols for each application - consult your ATI technician for assistance.

BOLT PATTERN
PART #
BOLT SIZE
TEETH
PRICE
Chevy SB - High HP - standard holes
915544
168
$242.00
Chevy 6 bolt for 7/16” bolts (standard replacement) - 2-piece rear seal crank flange
915554
7/16"
168
$289.00
Chevy 6 bolt for 7/16” bolts (needs special starter)* - 2-piece rear seal crank flange
915555*
7/16"
139 - 10DP
$299.00
Chevy 6 bolt for 1/2” bolts (fits inside SFI 6.3 can) - 2-piece rear seal crank flange
915570
7/16"
166
$299.00
Chevy 6 bolt for 1/2” bolts - 2-piece rear seal crank flange
915548
1/2"
168
$299.00
Chevy 6 bolt for 1/2” bolts - 2-piece rear seal crank flange
915556*
1/2"
139 - 10DP
$289.00
Chevy - Chrysler 8 bolt for 1/2” bolts (uses standard Chevy starter)
915547
1/2"
168
$299.00
Chevy - Chrysler 8 bolt for 1/2” bolts (needs special starter)*
915557*
1/2"
139 - 10DP
$299.00
Chevy - Chrysler 8 bolt for 1/2” holes (fits inside SFI 6.3 can)
915691
1/2"
139 - 10DP
$279.00
* needs special starter

Chrysler V8 - For internally balanced engines

APPLICATION
PART #
BOLT SIZE
TEETH
PRICE
6 Bolt Crank
915558
1/2"
130
$279.00
8 Bolt Crank
915549
1/2"
130
$279.00
8 Bolt Crank (Chevy starter)
915547 [1]
1/2"
168
$299.00
8 Bolt Crank (relocate starter)
915557 [1]
1/2"
139 - 10DP
$299.00

[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
$21.00
FORD COYOTE - FLEX TO CRANK - M10 X 1.00 X 35MM, CLASS 10.9 HHCS - (Pack of 8)
951378-8
$37.00
FORD MOD AND LATE HEMI
950144
$22.00
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
$49.00
MOPAR HEMI 1/2 - 20 X 1-1/4”, .700 GRIP, 12 PT (Pack of 8)
951035-8
$61.00
FLEXPLATE TO CRANK 1/2 - 20 x 7/8” Use with 1/4” HEMI fuel crank adapter (Pack of 8)
951057-8
$44.00
CHEVY 1/2 - 20 X 1-1/4”, .700 GRIP, 12 PT (Pack of 6)
951035-6
$49.00
FORD 429-460 7/16 - 20 X 1”, .200 GRIP, 12 PT (Pack of 6)
951036-6
$29.00
FORD MOD MOTORS & NEW GEN HEMI - M10 X 1.0 X 30MM, .300 GRIP, 12 PT (Pack of 8)
951037-8
$37.00
FLEXPPLATE TO CRANK 1/2 - 20 x 1-1/4”, .225 HEAD,GRADE 8 (Pack of 8)
951435-8
$22.00

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 - Flexplate to crank for use with midplate
Part Number
Price
7/16 - 20 X 1-3/32 (Must use #951000 adapter) (Pack of 6)
951062-6
$26.00
1/2 - 20 X 1-3/32 (Must use #951001 adapter) (Pack of 6)
951063-6
$30.00

Flexplate Hardware - High HP use without crank adapter
Part Number
Price
FLEXPLATE TO CRANK 1/2 - 20 x 7/8” - Pack of 6
951057-6
$37.00
FLEXPLATE TO CRANK 1/2 - 20 x 13/16” - Pack of 6
951058-6
$44.00
FLEXPLATE TO CRANK 1/2 - 20 x 13/16” - Pack of 8
951058-8
$51.20
FLEXPLATE TO CRANK 1/2 - 20 x 1” - ,450 GRIP - 12 PT EXTREME DUTY - Pack of 6
951059-6
$42.00
FLEXPLATE TO CRANK 1/2 - 20 x 1” - ,450 GRIP - 12 PT EXTREME DUTY - Pack of 8
951059-8
$45.00
CHRYSLER /CHEVY 6-BOLT CRANKS WITH HD MACHINED ON-SIZE FLEXPLATES
1/2 - 20 x 13/16” (modified to 0.722" length) - Pack of 6
951058M-6
$53.00
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
$69.00
CHEVY FLEXPLATE TO CRANK FOR USE WITH CHEVY / OLDSMOBILE CRANKS
7/16 - 20 x 11/16” - Pack of 6
951479-6
$22.00
 
Spacer
Spacer
 
News
Tech Help
Jobs
Contingency Warranty
Contact Us
6718 Whitestone Road
Gwynn Oak, MD 21207
877-298-5039
Fax 410-298-3579
Follow ATI
   

  © 2018 ATI Performance Products, Inc | All Rights Reserved | Prices subject to change without notice