2003 Avanti Ii Parts

TCI

399754 SFI-Approved Flexplate LS1/LS2/LS6/LS7 to 4L80-E Transmission

Part Number: 890-399754

Ships on 10/28/2026

^$375⁹⁵

CHAMPION SPARK PLUGS

Iridium Spark Plug 14mm Thread

Part Number: 192-9404

^$12⁹⁹

CHAMPION SPARK PLUGS

Iridium Spark Plug 14mm Thread

Part Number: 192-9404

^$12⁹⁹

JEGS

Automatic Transmission Pan for GM TH700R4, 4L60, 4L60E/65E Stock Capacity [Chrome Plated Steel]

Part Number: 555-60166

^$35⁹⁹$41.99

$6.00

JEGS

Automatic Transmission Pan for GM TH700R4, 4L60, 4L60E/65E Stock Capacity [Chrome Plated Steel]

Part Number: 555-60166

^$35⁹⁹ $41.99

YOU SAVE

$6.00

SPEEDMASTER

SFI-Approved Fluid Harmonic Damper Balancer Chevy/GM LS LS1/LS6

Part Number: 746-PCE291.1073

^$182¹⁰

SPEEDMASTER

SFI-Approved Fluid Harmonic Damper Balancer Chevy/GM LS LS1/LS6

Part Number: 746-PCE291.1073

^$182¹⁰

CLEVITE MAHLE

Automatic Transmission Gasket 1982-2012 GM 700R4/4L60/4L60E in Cork-Rubber

Part Number: 695-W39365

^$12¹⁵$13.51

$1.36

CLEVITE MAHLE

Automatic Transmission Gasket 1982-2012 GM 700R4/4L60/4L60E in Cork-Rubber

Part Number: 695-W39365

^$12¹⁵ $13.51

YOU SAVE

$1.36

TRANS GO

Reprogramming Kit 4L60E

Part Number: 887-4L60E-PRO

^$214²⁰$238.00

$23.80

TRANS GO

Reprogramming Kit 4L60E

Part Number: 887-4L60E-PRO

^$214²⁰ $238.00

YOU SAVE

$23.80

ATK ENGINES

Remanufactured Cylinder Head for 1999-2004 Chevy/Pontiac with 5.7L LS1 V8

Part Number: 059-2CTT

^$454⁹⁹

ATK ENGINES

Remanufactured Cylinder Head for 1999-2004 Chevy/Pontiac with 5.7L LS1 V8

Part Number: 059-2CTT

^$454⁹⁹

HAYS

Twister 3/4 Race Torque Converter

Part Number: 490-97-1G28Q

^$849⁹⁵

HAYS

Twister 3/4 Race Torque Converter

Part Number: 490-97-1G28Q

^$849⁹⁵

HAYS

Twister 3/4 Race Torque Converter

Part Number: 490-97-1H32Q

^$899⁹⁵

HAYS

Twister 3/4 Race Torque Converter

Part Number: 490-97-1H32Q

^$899⁹⁵

HAYS

Twister 3/4 Race Torque Converter

Part Number: 490-97-1H28Q

^$779⁹⁵

HAYS

Twister 3/4 Race Torque Converter

Part Number: 490-97-1H28Q

^$779⁹⁵

FEL-PRO

Economy Head Gasket GM LS1, 346, 350

Part Number: 375-26190PT

^$44⁹⁹

FEL-PRO

Economy Head Gasket GM LS1, 346, 350

Part Number: 375-26190PT

^$44⁹⁹

JEGS

Automatic Transmission Pan for GM TH700R4, 4L60, 4L60E/65E Stock Capacity [Black Powder Coated Steel]

Part Number: 555-601185

^$32⁹⁹$39.89

$6.90

Ships on 11/16/2026

JEGS

Automatic Transmission Pan for GM TH700R4, 4L60, 4L60E/65E Stock Capacity [Black Powder Coated Steel]

Part Number: 555-601185

Ships on 11/16/2026

^$32⁹⁹ $39.89

YOU SAVE

$6.90

CHAMPION SPARK PLUGS

RS14YC6 Spark Plug 1/pkg

Part Number: 192-13

^$2⁹⁹

CHAMPION SPARK PLUGS

RS14YC6 Spark Plug 1/pkg

Part Number: 192-13

^$2⁹⁹

MELLING

M295HV Stock Replacement Oil Pump for 1999-2015 GM LS Gen III/IV 4.8/5.3/5.7/6.0/6.2L, High Volume, Standard Pressure

Part Number: 689-M295HV

^$125⁹⁹

MELLING

M295HV Stock Replacement Oil Pump for 1999-2015 GM LS Gen III/IV 4.8/5.3/5.7/6.0/6.2L, High Volume, Standard Pressure

Part Number: 689-M295HV

^$125⁹⁹

SPEEDMASTER

High-Output E-Poxy Ignition Coil Set GM LS1/LS6

Part Number: 746-PCE382102402

^$265⁰⁰

SPEEDMASTER

High-Output E-Poxy Ignition Coil Set GM LS1/LS6

Part Number: 746-PCE382102402

^$265⁰⁰

SPEEDMASTER

Ignition Coil On Plug D585 Set of 8 GM LS

Part Number: 746-PCE382103202

^$440⁰⁰

SPEEDMASTER

Ignition Coil On Plug D585 Set of 8 GM LS

Part Number: 746-PCE382103202

^$440⁰⁰

SPEEDMASTER

PCE460.1008 GM LS1/LS2/LS3/LS6/LS7/L76 Blower Drive Kit For 6-71/8-71 Roots Supercharger

Part Number: 746-PCE460.1008

^$1,325⁰⁰

SPEEDMASTER

PCE460.1008 GM LS1/LS2/LS3/LS6/LS7/L76 Blower Drive Kit For 6-71/8-71 Roots Supercharger

Part Number: 746-PCE460.1008

^$1,325⁰⁰

SPEEDMASTER

PCE460.1015 Complete 6-71 Roots Supercharger Blower Kit for GM LS1 Engines

Part Number: 746-PCE460.1015

^$5,985⁰⁰

SPEEDMASTER

PCE460.1015 Complete 6-71 Roots Supercharger Blower Kit for GM LS1 Engines

Part Number: 746-PCE460.1015

^$5,985⁰⁰

SILVER SPORT TRANSMISSIONS

BHG-00105A Transmission Bellhousing Kit for GM LS/LT Engines w/168-Tooth Flywheel

Part Number: 833-BHG-00105A

^$293⁴⁷$339.95

$46.48

SILVER SPORT TRANSMISSIONS

BHG-00105A Transmission Bellhousing Kit for GM LS/LT Engines w/168-Tooth Flywheel

Part Number: 833-BHG-00105A

^$293⁴⁷ $339.95

YOU SAVE

$46.48

SPEEDMASTER

CHEVY LS 2005 2013 CORVETTE C6 Z06 STAINLESS STEEL RACE HEADER

Part Number: 746-PCE316.1139

^$393¹⁰

SPEEDMASTER

CHEVY LS 2005 2013 CORVETTE C6 Z06 STAINLESS STEEL RACE HEADER

Part Number: 746-PCE316.1139

^$393¹⁰

SPEEDMASTER

Turbo Exhaust Headers GM LS 4.8/5.3/6.0L - Stainless Steel

Part Number: 746-PCE316.1150

^$207⁷⁰

Ships on 11/02/2026

SPEEDMASTER

Turbo Exhaust Headers GM LS 4.8/5.3/6.0L - Stainless Steel

Part Number: 746-PCE316.1150

Ships on 11/02/2026

^$207⁷⁰

WEIAND

LS1 Aluminum Intake Manifold Polished finish

Part Number: 925-300-111P

^$1,062⁹⁵

Ships on 10/19/2026

WEIAND

LS1 Aluminum Intake Manifold Polished finish

Part Number: 925-300-111P

Ships on 10/19/2026

^$1,062⁹⁵

WEIAND

8170WND Speed Warrior Intake Manifold for 1987-1995 Chevy 262-400 w/ Cast Iron Heads

Part Number: 925-8170WND

^$319⁹⁵

WEIAND

8170WND Speed Warrior Intake Manifold for 1987-1995 Chevy 262-400 w/ Cast Iron Heads

Part Number: 925-8170WND

^$319⁹⁵

TCI

2nd Gear Corvette-Style Servo Kit GM 700R4/4L60E/4L65E

Part Number: 890-376003

^$85³⁷$98.95

$13.58

TCI

2nd Gear Corvette-Style Servo Kit GM 700R4/4L60E/4L65E

Part Number: 890-376003