AFR 260cc LS3 Mongoose Cylinder Heads 1840

AFR 260cc LS3 Mongoose Cylinder Heads 1840

AFR-1840

5 out of 5 stars ( 2 )

Part Number: AFR-1840

Estimated Ship Date from OH, NV: Monday 11/9/2026

$3,188.99

Results 1 - 11 of 11

Valve Stem Seal, 8mm Diameter, Viton® Rubber, Positive Stop, Set of 16

Part Number: AFR-6612-16

4.73 out of 5 stars ( 11 )

Estimated Ship Date: Monday 11/9/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 11/9/2026 if shipped by air

Valve Locks, 0.314 in. Stem Diameter, 7 Degree, 1-Groove Beadlock Style, Steel, Machined, Pair

Part Number: AFR-9007-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/9/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 11/9/2026 if shipped by air

Valves, Stainless Steel, Intake, 2.165 in. Head Diameter, 0.315 in. Stem Diameter, 5.195 in. Length, Beadlock 1-Groove, Chevy, 6.0L, LS3, Each

Part Number: AFR-7214-1

Not Yet Reviewed

Estimated Ship Date: Monday 11/9/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 11/9/2026 if shipped by air

Valves, AFR Replacement Stainless Steel Valves, Exhaust, 1.600 in. Head Diameter, 0.314 in. Stem Diameter, Chevrolet, Each

Part Number: AFR-7212-1

Not Yet Reviewed

Estimated Ship Date: Monday 11/9/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 11/9/2026 if shipped by air

Valve Seat Insert, Intake, Ductile Iron, 1.780 in. i.d., 2.200 in. o.d., 0.375 in. Thick, Chevy, Small Block

Part Number: AFR-9060

Not Yet Reviewed

Estimated Ship Date: Monday 11/9/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 11/9/2026 if shipped by air

Valve Spring, Standard, Single Spring, 1.270 in. Outer Spring Diameter, 0.645 in. Inner Spring Diameter, 1.080 in. Coil Bind Height, Each

Part Number: AFR-8019-1

Not Yet Reviewed

Estimated Ship Date: Monday 11/9/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 11/9/2026 if shipped by air

LS3 Rocker Arm Rails

Part Number: AFR-6040

Not Yet Reviewed

Estimated Ship Date: Jan 4, 2027 if ordered today

...Loading

Estimated Ship Date: Jan 4, 2027 if ordered today

Valve Seat Inserts, Exhaust, Ductile Iron, 1.350 in. I.D., 1.650 in. O.D., Chevrolet, Ford, Each

Part Number: AFR-9069

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 11/9/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 11/9/2026 if shipped by air

Valve Spring Locators, Outside Shoulder Type, 1.380 in. O.D., 0.570 in. I.D., Use with AFR 8017 and 8019 Valve Springs, Steel, Each

Part Number: AFR-8042-1

Not Yet Reviewed

Estimated Ship Date: Monday 11/9/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 11/9/2026 if shipped by air

Valve Spring Retainer, 7 degree, 1.250 in. O.D., Titanium, Each

Part Number: AFR-8512-1

Not Yet Reviewed

Estimated Ship Date: Jan 4, 2027 if ordered today

...Loading

Estimated Ship Date: Jan 4, 2027 if ordered today

LS3 8mm Bronze Guide, .502 OD, Ea.

Part Number: AFR-9053-1

Not Yet Reviewed

Estimated Ship Date: Jan 4, 2027 if ordered today

...Loading

Estimated Ship Date: Jan 4, 2027 if ordered today

  • 1
  • Page 1 of 1
Modal Header

Call To Order

This is a custom order part. You can order this part by Contacting Us.

Call now to speak with a sales specialist!

Call Now!

1-800-230-3030