Gwatney Performance Parts
Products
Oil Pumps
GPI – Gen 5 LT Oil & Vacuum Pump Combo
- Increased Efficiency: Enhanced oil flow at high RPMs and under hard acceleration, solving the inherent issue of OE style oil pumps.
- Innovative Design: The vacuum pump assembly is driven off the back of the oil pump, replacing the AC compressor and reducing vehicle weight.
- Modified Oil Pan: Features an AN 16 feed for the oil pump inlet, modified to accommodate the new system.
- OE Integrated Filter: Comes with an oil filter adapter that allows for retention of the OE integrated filter - no remote filter required.
- Weight Reduction: Includes an oil cooler delete component to further reduce weight.
Assembled Long Blocks
GPI Ultra 4 LS 427 Long Block – 700 HP
Part Number: SM14822
- 427 CID LS Long Block
- 700 HP @ 6,500 RPM
- 625 LB-FT @ 5,000 RPM
- 12.6:1 Compression Ratio
- 6-Bolt Iron Block
Tuning Services
Part Number: GPI-HEX2HP-BENCH-FLASH
- For 1999–present GM gas applications
- Initial startup-ready base calibration
- Supports leak and operation checks
- HP Tuners device and credits accepted
- Final tuning required after base map
Tuning Services
GPI – Hex2HP Speed Limiter Removal Service (GPI-HEX2HP-SPEED-LIMITER)
Part Number: GPI-HEX2HP-SPEED-LIMITER
- Disables the factory vehicle speed limiter
- Software calibration service only
- Requires HP Tuners (HPT)
- Speed limiter removal only
- Compatibility must be confirmed
AFM Delete
GPI – Hex2HP AFM/DFM/DOD Delete Service for All GM Gas Applications (GPI-HEX2HP-AFM-DOD-DELETE)
Part Number: GPI-HEX2HP-AFM-DOD-DELETE
- Disables AFM, DFM, or DOD operation
- For compatible GM gasoline vehicles
- Software calibration service
- HP Tuners (HPT) is required
- No mechanical delete parts included
Cylinder Heads
Part Number: BTR-CVH3P-LT4-FER
- 64cc Finished Chamber
- 90cc Exhaust Port
- 265cc Intake Port
- 11° x 5° Canted Intake / 13° x 3° Canted Exhaust
- Gen V LT4 2.125″ Titanium Intake & 1.600″ Ferrea Super Alloy Exhaust Valves
Porting Services
GPI – Hi Ram Manifold Mill and Match
- This service is for milling hi ram manifold to fit cylinder heads that have had a significant amount of deck surface removed, as well as port matching to those cylinder heads
- Must provide the actual heads that are going to be used in order for us to complete this service
Cylinder Heads
Part Number: BTR-CVH1P-LT4-FER
- 61cc Finished Chamber
- 90cc Exhaust Port
- 250cc Intake Port
- 11° x 5° Canted Intake / 13° x 3° Canted Exhaust
- Gen V LT4 2.125" Titanium Intake & 1.600" Ferrea Super Alloy Exhaust Valves
Assembled Short Blocks
GPI – 388 CI LS Dart Short Block, Wet Sump
Part Number: SM11698
- 388 Cubic Inch
- Dart LS Next Iron Block, 9.220" Deck
- Callie's Compstar 3.625" Stroke Crankshaft
- Callie's Compstar Extreme 6.125" Rods
- CP Carillo Bullet 4.135" Bore Pistons
Valve Cover Baffle
GPI – Valve Cover Baffle Adapter, Flat Profile
Part Number: KC-VCADAP-R1
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Cylinder Heads
GPI – Brodix BR7 278cc Hydraulic Roller Cylinder Heads
- Minimum bore diameter: 4.125"
- Intake port volume: 278cc
- Exhaust port volume: 98cc
- Combustion chamber: 72cc - 55cc
- Intake valve: 2.200"
2020-2026 Corvette (C8)
GPI – C8 Corvette N/A 625 Complete Package (Installed)
- HUGE 127 hp / 76 ft-lb Power Gain over stock!
- Excellent drive-ability and reliability for a trip to work, across the country, or the track
- Top-Performing components perfectly matched to provide “MAX Effort” performance right out of the box
- No compromises bolt-on package, no fly-cutting or machining, all components included for a complete installation
- Consistent, reliable, robust performance without the additional weight and heat soak issues associated with forced induction
Induction
FAST LSXRT Intake Manifold 146105B for Rectangular Port PORTING SERVICE ONLY
Part Number: FST-146105B-Porting
GPI Hand Porting Please include a copy of your order confirmation with the manifold and ship to: Gwatney Performance Innovation ATTN: PORTING SERVICE 200 Municipal Dr Jacksonville, AR 72076 501-985-4947
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