Airflow Research Heads

205cc LS1 Mongoose Street Head

The Small Port, High Velocity Torque Monster

For the ultimate street LS1/LS6 aluminum cylinder head AFR’s all new 205cc emission legal head are your only choice. Specifically designed for 1995 to present Gen-3 Chevy Corvettes, Camaros, and trucks. AFR’s LS1 head offers unmatched flow performance (300 CFM at .600lift) and features 2.020 intake and 1.600 exhaust valves with AFR’s iron ductile interlocking valve seats. With only 205cc port volume (same as stock LS1 head) this is an incredibly 70 CFM increase over stock casting creating unbelievable port velocity and performance. The 205cc is ideal for normally aspirated 346C.I. to 396C.I. It is available with 66cc and 76cc combustion chambers. An affordable “as cast” version is also available. AFR’s LS1 is a direct bolt on, no special parts required. Structural features like Air Flow Research’s trademark 3/4” thick head deck, a must for blown and nitrous applications, reinforced rocker stud bosses, and thick wall runners provide unparalleled durability. An exclusive new modern combustion chamber design with double quench pad area helps the LS1 generate huge low and mid lift airflow numbers. If you need a snake charmer for that pesky neighborhood “Cobra Mustang” look no further.

Note:

Hydraulic roller cams typically experience valve float at 6000-6200 RPM because of their fast ramp rates. AFR suggest you upgrade your springs to AFR part #8019, 1.450 O.D. double with dampener valve spring with higher pressures to reduce the chances of valve float at higher RPM’s.

 

 

205cc Mongoose LS1 Racing Head Part Numbers

CNC Ported Pairs of Cylinder Heads Complete With Parts and Ready to Install

CNC Street Porting

 Description

 Part Number
205cc CNC Ported w/parts 66cc 1510
205cc CNC Ported w/o parts 66cc 1520
205cc CNC Ported w/parts 76cc 1530
205cc CNC Ported w/o parts 76cc 1540
200cc As Cast w/ parts 64cc 1550
200cc As Cast w/o parts 64cc 1560
200cc As Cast w/ parts 74cc 1570
200cc As Cast w/o parts 74cc 1580
200cc As Cast w/ parts 66cc CNC Chambers 1550-1
200cc As Cast w/o parts 66cc CNC Chambers 1560-1
200cc As Cast w/ parts 76cc CNC Chambers 1570-1
200cc As Cast w/o parts 76cc CNC Chambers 1580-1


Not legal for sale or use on pollution controlled motor vehicles in the United States.

Basic Package Components

100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
3-angle Raduised Valve Job
Intake Valve, 2.020” standard length #7207
Exhaust Valve, 1.600” standard length #7228
1.250” OD Hydraulic Valve Spring with dampner, 130 lbs. on seat, .550” maximum lift #8017 (upgrades available)
7º 1.250 Titanium Retainers #8512
7º Valve Locks #9007
Valve Seals #6612
Hardened Shims #8042
Intake Valve Seats #9058
Exhaust Valve Seats #9069
Bronze Valve Guides #9051
 

All Accessory Holes are Predrilled & Tapped!

Specifications, Features, and Supporting Components

Head Torque 11MM ARP 70w/Moly 8mm 23w/Moly
Exhaust Port Gasket GM#12558573/ Fel-Pro #1440 AFR#6857
Intake Port Volume (as cast) 200cc
Intake Valve Size 2.020
Exhaust Port Volume (as cast) 78cc
Head Gasket GM#12498543 or 12498544, Fel-Pro#1041, AFR#6847
Exhaust Valve Size 1.600
Head Bolts & Studs Standard ARP, AFR #6330, #6331 & #6332
Head Bolt Washers Standard ARP, AFR #6328 & #6329
Jesel or TD Shaft Mount
Suggested Manifold LS6 or FAST
Accessory Holes Are Drilled Yes
Spark Plug Starting Range AC 41-974 Platinum
Combustion Chambers 66cc or 76cc
Spring Pocket can 1.250-can be machined to 1.550 O.D.
Valve Spacing Stock
Rocker Arms Stock
Valve Angle Stock
Angle Mill (milling available) .008” per cc
Flat Mill (milling available) .006” per cc

225cc LS1 Mongoose Strip Head

The Ultimate Bolt-On Emission Legal Street/Strip Weapon

For the maximum street/strip LS1/LS6 aluminum cylinder head AFR’s all new 225cc emission legal head are hands down the best choice. Specifically designed for 1995 to present Gen-3 Chevy Corvettes, Camaros, and trucks. AFR’s LS1 head offers unmatched flow performance and features 2.080 intake and 1.600 exhaust valves with AFR’s iron ductile interlocking valve seats. The 225cc is ideal for normally aspirated 396C.I. to 427C.I. It is available with 66cc and 76cc combustion chambers. An affordable “as cast” version is also available. AFR’s LS1 is a direct bolt on, no special parts required. Structural features like Air Flow Research’s trademark 3/4” thick head deck, a must for blown and nitrous applications, reinforced rocker stud bosses and thick wall runners provide unparalled durability. An exclusive new modern combination chamber design with double quench pad area helps the LS1 generate huge low and mid lift airflow numbers. If you need a snake charmer for that pesky neighborhood “Cobra Mustang” look no further!

Note:

Hydraulic roller cams typically experience valve float at 6000-6200 RPM because of their fast ramp rates. AFR suggest you upgrade your springs to AFR part #8019, 1.450 O.D. double with dampener valve spring with higher pressures to reduce the chances of valve float at higher RPM’s.

 

225cc Mongoose LS1 Racing Head Part Numbers

CNC Ported Pairs of Cylinder Heads Complete With Parts and Ready to Install

CNC Street Porting

 Description

 Part Number
225cc CNC Ported w/parts 66cc 1610
225cc CNC Ported w/o parts 66cc 1620
225cc CNC Ported w/parts 76cc 1630
225cc CNC Ported w/o parts 76cc 1640
220cc As Cast w/ parts 64cc 1650
220cc As Cast w/o parts 64cc 1660
220cc As Cast w/ parts 74cc 1670
220cc As Cast w/o parts 74cc 1680
220cc As Cast w/ parts 66cc CNC Chambers 1650-1
220cc As Cast w/o parts 66cc CNC Chambers 1660-1
220cc As Cast w/o parts 76cc CNC Chambers 1670-1
220cc As Cast w/o parts 76cc CNC Chambers 1680-1

These heads will be available mid 2004


Not legal for sale or use on pollution controlled motor vehicles in the United States.

Basic Package Components

100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
3-angle Raduised Valve Job
Intake Valve, 2.080” standard length #7208
Exhaust Valve, 1.600” standard length #7228
1.250” O.D. Hydraulic Valve Spring with dampner, 130 lbs. on seat, .550” maximum lift (upgrades available) #8017
7º 1.250 Titanium Retainers #8512
7º Valve Locks #9007
Valve Seals #6612
Hardened Shims #8042
Intake Valve Seats #9058
Exhaust Valve Seats #9069
Bronze Valve Guides #9051
 

Specifications, Features, and Supporting Components

Head Torque 11MM ARP 70w/Moly 8mm 23w/Moly
Exhaust Port Gasket GM#12558573/ Fel-Pro #1440 AFR#6859
Intake Port Volume (as cast) 220cc
Intake Valve Size 2.080
Exhaust Port Volume (as cast) 78cc
Head Gasket GM#12498543 or 12498544, Fel-Pro#1041, AFR#6847
Exhaust Valve Size 1.600
Head Bolts & Studs Standard ARP, AFR #6330, #6331 & #6332
Head Bolt Washers Standard ARP, AFR #6328 & #6329
Jesel or TD Shaft Mount
Suggested Manifold LS6 or FAST
Accessory Holes Are Drilled Yes
Spark Plug Starting Range AC 41-974 Platinum
Combustion Chambers 66cc or 76cc
Spring Pocket can be cut to 1.250-can be machined to 1.550 O.D.
Valve Spacing Stock
Rocker Arms Location Stock
Valve Angle Stock
Angle Mill (milling available) .008” per cc
Flat Mill (milling available) .006” per cc

 
Part Number Item Price
1560 LS1 AFR 64cc 200 bare unported w no parts $1554.99
1560-1 LS1 AFR  66cc 200 bare unported w no parts $1794.99
1580 LS1 AFR  74cc 200 bare unported w no parts $1554.99
1580-1 LS1 AFR  76cc 200 bare unported w no parts $1794.99
     
1550 LS1 AFR 64cc 200 bare unported - assembled $1844.99
1550-1 LS1 AFR 66cc 200 bare unported - assembled $2084.99
1570 LS1 AFR 74cc 200 bare unported - assembled $1844.99
1570-1 LS1 AFR 76cc 200 bare unported - assembled $2084.99
     
1520 LS1 AFR 66cc 205 bare, fully ported with no parts $2134.99
1540 LS1 AFR 76cc 205 bare, fully ported with no parts $2134.99
     
1510 LS1 AFR 66cc 205 assembled and fully ported $2424.99
1530 LS1 AFR 76cc 205 assembled and fully ported $2449.99

 

SLP Cylinder head/cam package

 

 

 
Cylinder Head and Cam Package, LS-1 350/410 HP
SLP Cylinder Head and Camshaft Performance Packages Feature:

SLP custom CNC ported cylinder heads (NO cores necessary!)
  • Precision CNC ported chambers and ports for maximum flow, velocity and swirl
  • High performance muti-angle angle valve job (2.00" Intake & 1.55" Exhaust)
  • Milled to 63.5 cc chamber (10.7:1 compression)
  • Blueprint assembled with the following new parts:
    • SLP lightweight titanium valve spring retainers
    • SLP high performance chrome silicone 1.250" springs
    • New GM valve seals and keepers
    • SLP 51011 high performance camshaft
      • SLP's high performance 51011 camshaft has been engineered with the optimum specifications for performance and drivability

       
Part Number Item Price
12226 1999-'05 SLP Cylinder Head and Cam Package, LS-1 346 CID 525HP $2954.99

 
 

If you would like to place an order, just click the button at the bottom of the left column to use our quick and easy online ordering system or call 1-877-4-TBYRNE. We can also be reached at tbyrne@tbyrne.com

Prices do not include shipping and are subject to change without notice. We are not responsible for any misprints, typographical errors or any costs associated with the installation of any products. Returns are subject to a 20% restocking fee and must be done within 30 days. Some cancellations are subject to a 10% processing fee. Sale prices can not be combined with other discounted packages and are only available during the sale period. Credits will not be issued if a product goes on sale after it is purchased. No refunds on electrical, special order, used or non-stock items. Allow 15 days for personal checks to clear. Sorry, no CODs.