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AFR 1680/1690 LS1 245/65 OR 73CC .650 LIFT ASSEMBLED YOUR CHOICE OF CHAMBER SIZE
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AFR 1680/1690 LS1 245/65 OR 73CC .650 LIFT ASSEMBLED YOUR CHOICE OF CHAMBER SIZE
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AFR 1680/1690 LS1 245/65 OR 73CC .650 LIFT ASSEMBLED YOUR CHOICE OF CHAMBER SIZECALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. Our max effort cathedral port head for the LSX platform is recommended for race applications or radical "Pro Street" builds with displacements up to 454 cubic inches, operating at or below 6800 RPM. Requires a minimum bore size of 4. 000" to clear the supplied 2. 165" intake valve. 245cc Aluminum LS1 Cylinder Heads Part # Description Combustion Chamber 1680 Large Bore (4. 000+) 65cc 1690 Large Bore (4.
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CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
Our max effort cathedral port head for the LSX platform is recommended for race applications or radical "Pro Street" builds with displacements up to 454 cubic inches, operating at or below 6800 RPM. Requires a minimum bore size of 4.000" to clear the supplied 2.165" intake valve.
| 245cc Aluminum LS1 Cylinder Heads | ||
|---|---|---|
| Part # | Description | Combustion Chamber |
| 1680 | Large Bore (4.000+) | 65cc |
| 1690 | Large Bore (4.000+) | 73cc |
Click part # to add product to your cart
| 245cc Street Head Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | |
| Int | 164 | 233 | 290 | 332 | 347 | 356 | 360 |
| Exh | 131 | 185 | 227 | 247 | 249 | 257 | 267 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.155", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Basic Package Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
| Competition 5-angle Valve Job | |
| 8mm Bead Lock Intake Valve, 2.165" x 4.900" Overall Valve Length |
7211
|
| 8mm Bead Lock Exhaust Valve, 1.600" x 4.900" Overall Valve Length |
7228
|
| PAC Racing Spring 1.270" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, Max RPM 7000-7200 |
8019
|
| 7° Titanium Retainers 1.245" O.D x .885" I.D x .655" I.D |
8512
|
| 7° Bead Lock Valve Keepers |
9007*
|
| Viton Valve Seals .600" O.D x .495" I.D |
6612
|
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D |
8042
|
| Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep |
9060
|
| Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep |
9069
|
| 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L |
9051
|
| Recommended Components: | |
| Intake Port Gasket |
GM or FAST
|
| Exhaust Port Gasket |
GM #12558573
|
| Head Gasket, Cometic 4.200 .040" |
6845
|
| Head Bolts (97-03), ARP 134-3609 |
6330
|
| Head Studs (97-03), ARP 234-4110 |
6331
|
| Head Bolts (04+), ARP 134-3610 |
6334
|
| Head Studs (04+), ARP 234-4317 |
6335
|
| Head Bolt Washers, Manley |
6320
|
| Suggested Manifold |
FAST 90mm, 92mm, or 102mm
|
| Spark Plug Starting Range |
NGK TR55
|
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
245cc
|
| Intake Port Dimension |
3.315"H x 1.145"W x 11/32 top 13/32 bottom
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
88cc
|
| Exhaust Port Dimension |
1.495" H x 1.730" W
|
| Exhaust Port Location |
Stock
|
| Combustion Chamber Size |
65cc or 73cc
|
| Valve Cover Bolt Pattern |
Center Bolt
|
| Valve Angle |
15°
|
| Valve Spring Pocket Diameter |
1.510" O.D
|
| Max Valve Spring Pocket Machining |
1.525" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill - 65cc chamber |
.006" per cc 58cc Maximum
|
| Flat Mill - 73cc chamber |
.006" per cc 65cc Maximum
|
| Minimum Cross Sectional Area |
2.680 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
SHIPS IN THE LOWER 48 STATES FREE!
CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
CONTACT US THE PRICE IS NEGOTIABLE BEST OFFER
Warning: May cause cancer and reproductive harm.
AFR 1680/1690 LS1 245/65 OR 73CC .650 LIFT ASSEMBLED YOUR CHOICE OF CHAMBER SIZE
Item no
:
70436478677
US$ 3272.97
Pay in 4 interest-free payments of $818.24 Learn more
Min. order:
1piece
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jun 21 - Jun 26
US$40
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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