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Internal Engine Parts

All parts prices are subject to change. Mazda in particular has a nasty habit of changing prices without warning. These prices were correct at the time of listing and we update them as soon as we are aware of a change, so they should be pretty close but there are no guarantees. Main bearings, for example, went up 63% recently.
Displaying products 1 - 30 of 50 results
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Side seal, RX8, CUT to FIT
List Price: $38.34
Your Price: $21.38
You Save: $16.96 (44 %)
Side seal, RX8, CUT to FIT
Side seals, RX8, CUT to FIT
Solid, One Piece Dowel Pin(s)
Your Price: From $59.00 to $99.00
Solid, One Piece Dowel Pin(s)
1 piece Solid Dowel Pin, pick your engine and choice of 1 or 2 pins. Take advantage of Pair pricing!
Mazda 2mm, 2 piece 13B apex seal
Mazda 2mm, 2 piece 13B & 20B steel apex seal
List Price: $109.28
Your Price: $71.31
You Save: $37.97 (35 %)
Mazda 2mm, 2 piece 13B & 20B steel apex seal
Mazda 2mm 13B & 20B apex seal spring (long)
Mazda 2mm 13B & 20B Apex Seal Spring (Long)
List Price: $14.91
Your Price: $7.39
You Save: $7.52 (50 %)
Mazda 2mm 13B & 20B Apex Seal Spring  (Long)
These Mazda apex seal springs fit 2mm 13B & 20B apex seals from 1986 through 1993 (S4, S5, FD, RE, 20B). One long and one short spring are required per apex seal; 6 of each for a 2-rotor 13B and 9 of each for a 20B.
Mazda 2mm 13B & 20B apex seal spring (short)
Mazda 2mm 13B & 20B Apex Seal Spring (Short)
List Price: $13.87
Your Price: $6.89
You Save: $6.98 (50 %)
Mazda 2mm 13B & 20B Apex Seal Spring  (Short)
These Mazda apex seal springs fit 2mm 13B & 20B apex seals from 1986 through 1993 (S4, S5, FD, RE, 20B). One long and one short spring are required per apex seal; 6 of each for a 2-rotor 13B and 9 of each for a 20B.
13B-Turbo S5 Rotor Housing (front)
List Price: $868.77
Your Price: $749.00
You Save: $119.77 (14 %)
13B-Turbo S5 Rotor Housing (front)
Brand new OEM front rotor housing for 1989-1991 13B-Turbo (FC, 2nd gen, S5). Machined for running alternative spark plugs at no added cost. Recommend replacment in pairs. Rear housing is a different number, so order separately. Will NOT fit Flat Rate Box.
13B-REW Rotor Housing (rear)
List Price: $1,190.46
Your Price: $898.36
You Save: $292.10 (25 %)
13B-REW Rotor Housing (rear)
Brand new OEM rear rotor housing for 13B-REW (FD, 3rd gen). Machined for running alternative spark plugs at no added cost. Recommend replacment in pairs. Front rotor housing is different part number, so order separately.
FD Aluminum Oil Pan
FD Aluminum Oil Pan
List Price: $450.00
Your Price: $425.00
You Save: $25.00 (6 %)
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FD Aluminum Oil Pan
High-capacity, O-ringed Aluminum oil pan for 3rd gen FD RX-7 Note: This item does not fit into a flat rate box. Please do not pick this shipping choice. Thank You.
13B-REW rebuild kit
13B-REW heavy duty internal seal & spring rebuild kit
List Price: $1,474.90
Your Price: $1,240.00
You Save: $234.90 (16 %)
13B-REW heavy duty internal seal & spring rebuild kit
Complete internal heavy duty seal and spring rebild kit for Mazda 13B-REW (FD, 3RD GEN) engine. Includes our special heavy duty water seal kit.
Rotor Housing Coolant Plug
Rotor Housing Coolant Passage Plug
Your Price: $6.95
Rotor Housing Coolant Passage Plug
Blocks coolant passage to intake manifold, which is necessary in some swap applications.
Freeze Plug Kit
Freeze Plug Kit
Your Price: $16.95
Freeze Plug Kit
Replacment set of metric expansion plug (aka Freeze Plugs) for all RX-7 Rotary Engines.
Rotor Housing Oil Metering Plugs
Rotor Housing Oil Metering Plugs
Your Price: $4.95
Rotor Housing Oil Metering Plugs
Use these plugs to block the oil metering injection bungs in the rotor housings when running premix or other alternative means to lubricate the engine internals. Kit includes 2 plugs.
13B-REW rebuild kit
13B-FC (2nd gen RX-7) heavy duty internal seal & spring rebuild kit
List Price: $1,431.50
Your Price: $1,231.63
You Save: $199.87 (14 %)
13B-FC (2nd gen RX-7) heavy duty internal seal & spring rebuild kit
Complete internal heavy duty seal and spring rebild kit for Mazda 13B Turbo and Non-turbo FC (2nd gen) RX-7 engine. Includes our special heavy duty water seal kit.
13B-Turbo S5 Rotor Housing (rear)
List Price: $868.77
Your Price: $749.00
You Save: $119.77 (14 %)
13B-Turbo S5 Rotor Housing (rear)
Brand new OEM rear rotor housing for 1989-1991 13B-Turbo (FC, 2nd gen, S5). Machined for alternative spark plugs at no added cost. Recommend replacment in pairs. Rear housing is different part number, so order separately. Will not fit Flat Rate Box!
13B-REW Rotor Housing (front)
List Price: $1,190.46
Your Price: $898.36
You Save: $292.10 (25 %)
13B-REW Rotor Housing (front)
Brand new OEM front rotor housing for 13B-REW (FD, 3rd gen). Machined for running alternative spark plugs at no added cost. Recommend replacment in pairs. Front housing is different part number, so order separately. The REW is stronger than the FC housing
13B-Turbo S4 Rotor Housing (front)
List Price: $868.77
Your Price: $719.00
You Save: $149.77 (17 %)
13B-Turbo S4 Rotor Housing (front)
Brand new OEM front rotor housing for 1987-1989 13B-Turbo (FC, 2nd gen, S4). Machined for running alternative spark plugs at no added cost. Recommend replacment in pairs. Rear housing is differentt number, so order separately. Will NOT fit Flat Rate Box!
13B-Turbo S4 Rotor Housing (rear)
List Price: $868.77
Your Price: $719.00
You Save: $149.77 (17 %)
13B-Turbo S4 Rotor Housing (rear)
Brand new OEM rear rotor housing for 1987-1989 13B-Turbo (FC, 2nd gen, S4). Machined for running alternative spark plugs at no added cost. Recommend replacment in pairs. Rear housing is different number, so order separately. Will NOT fit Flat Rate Box!
Pineapple Racing HD Water Seal Kit
Pineapple Racing HD Water Seal Kit - 12A/13B '74-'85 ONLY see internal engine parts category for other applications.
Your Price: $124.95
Pineapple Racing HD Water Seal Kit - 12A/13B '74-'85 ONLY see internal engine parts category for other applications.
Fits 1974-85 12A/13B, Reusable. Kit includes inner/outer coolant seals, dowel pin(4), oil pedestal(4), ft. cover(1), rear stationary gear o rings and tension bolt washers (20).
Main Bearing (pre-93)
Main Bearing (pre-93/ 2004-08 RX8-a/t only)
List Price: $34.50
Your Price: $27.84
You Save: $6.66 (19 %)
Main Bearing (pre-93/ 2004-08 RX8-a/t only)
Main Bearing for all rotary engines prior to 1993 and the '04-'08 RX8, low hp engine(a/t). Two required per 2-rotor engine.
Rotor Bearing - Pre-FD 13B
13B Rotor Bearing (pre-93)
List Price: $34.50
Your Price: $29.60
You Save: $4.90 (14 %)
13B Rotor Bearing (pre-93)
13B Rotor Bearing. Technically this is a different part than the 13B-REW in the 3rd Gen FD RX-7, but you can get away substituting this significantly less expensive part.
Main Bearing (pre-93)
Main Bearing (93+)
List Price: $71.43
Your Price: $57.14
You Save: $14.29 (20 %)
Main Bearing (93+)
Main Bearing for 1993-1995 3rd gen FD RX-7 13B-REW engine. This is the multi-window version of the main bearing, only used on the 3rd gen RX-7 FDs. Two required per 2-rotor engine.
Rotor Bearing - Pre-FD 13B
13B Rotor Bearing (93+)
List Price: $71.43
Your Price: $57.14
You Save: $14.29 (20 %)
13B Rotor Bearing (93+)
13B-REW Rotor Bearing. Technically this is a different part than the earlier 13B rotor bearings, but we feel it is safe to substitute the less expensive earlier part if your budget is tight. Price is per bearing. We recommend replacement in pairs.
Side Seals (86-95)
0.7mm Side Seal (86-95)-sold individually
List Price: $33.11
Your Price: $16.99
You Save: $16.12 (49 %)
0.7mm Side Seal (86-95)-sold individually
Sold individually, these are the thinner 0.7mm thick side seals used from 1986 (FC) through 1995 (FD). They come a bit long, so you need to file/sand them down to fit. . Order 12 for a 13B 2-rotor engine or 18 for a 20B 3-rotor engine.
Side Seals (74-85)
1.0mm Side Seal (74-85)-sold individually
List Price: $15.63
Your Price: $13.20
You Save: $2.43 (16 %)
1.0mm Side Seal (74-85)-sold individually
These are the thicker 1.0mm thick side seals used from 1974 through 1985, both 12A and 13B applications. They come a bit long, so you need to file/sand them down to fit. Sold individually. Order 12 for a 12A or 13B 2-rotor engine.
Side Seal Springs (86-95)
0.7mm Side Seal Springs (86-95)-sold individually
List Price: $14.91
Your Price: $7.40
You Save: $7.51 (50 %)
0.7mm Side Seal Springs (86-95)-sold individually
These are the springs for the thinner 0.7mm thick side seals used from 1986 (FC) through 1995 (FD). Sold individually. Order 12 for a 13B 2-rotor engine or 18 for a 20B 3-rotor engine.
Side Seal Springs (74-85)
1.0mm Side Seal Spring (74-85)
List Price: $2.50
Your Price: $1.95
You Save: $0.55 (22 %)
1.0mm Side Seal Spring (74-85)
These are the springs for the thicker 1.0mm thick side seals used from 1974 through 1985, both 12A and 13B applications. Sold individually. Order 12 for a 12A or 13B 2-rotor engine.
Front Main Seal
Front Main Seal (pre-93)
List Price: $5.57
Your Price: $4.45
You Save: $1.12 (20 %)
Front Main Seal (pre-93)
Front Main Seal. Installs in front cover to prevent oil from leaking past the eccentric shaft. Always replace. One required per engine. This is technically the 2nd gen FC and earlier part, but they work fine for 3rd gen FDs (13B-REW) as well.
Front Main Seal
Front Main Seal (93+)
List Price: $10.60
Your Price: $9.01
You Save: $1.59 (15 %)
Front Main Seal (93+)
Rear Main Seal (all, excpet RENESIS)
Rear Main Seal (all, excpet RENESIS)
List Price: $13.49
Your Price: $10.79
You Save: $2.70 (20 %)
Rear Main Seal (all, excpet RENESIS)
Rear Main Seal for all RX-7s. Replace any time you remove flywheel.
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