24x System Components and Related Items
While not required, please select the details below to assist you in choosing the appropriate EFI 24x related components for your project vehicle. After choosing from the selections below, the recommended items for your engine and vehicle will be indicated below as you scroll down this page. If you have questions, please email us anytime or call us during normal business hours.
Engine Type:
Timing Chain Rows:
Valve Covers:
Throttle Type:
Transmission Type:
Vehicle Type:

24x Crank and Cam Signal Equipment (PACKAGE PRICING)
Choose from the EFI 24x packages below or click on any part number to view more details, order individual components, or order replacement parts.
 Part #DescriptionPriceCart Qty 
24x SBC Conversion Kit, Plastic Vortec Timing Cover, Cast Aluminum Distributor120-0002224x SBC Conversion Kit, Plastic Vortec Timing Cover, Cast Aluminum Distributor$530.00
24x SBC Conversion Kit, Aluminum Timing Cover, Cast Aluminum Distributor120-0002324x SBC Conversion Kit, Aluminum Timing Cover, Cast Aluminum Distributor$825.00
24x LT1 Conversion Kit for 96-97 GM Timing Cover and Single Row Timing Set120-0001724x LT1 Conversion Kit for 96-97 GM Timing Cover and Single Row Timing Set$540.00
24x LT1 Conversion Kit for Billet Timing Cover and Single/Double Row Timing Set120-0001824x LT1 Conversion Kit for Billet Timing Cover and Single/Double Row Timing Set$440.00


24x Crank and Cam Signal Equipment (INDIVIDUAL PRICING)
Piecing together your own 24x conversion? Choose from the 24x related individual components below.
 Part #DescriptionPriceCart Qty 
24x LT1 Crank Reluctor for 96-97 GM Timing Cover and Single Row Timing Set120-0000124x LT1 Crank Reluctor for 96-97 GM Timing Cover and Single Row Timing Set$275.00
24x SBC/LT1 Crank Reluctor for Single/Double Row Timing Set120-0000224x SBC/LT1 Crank Reluctor for Single/Double Row Timing Set$275.00
24x Crankshaft Position Sensor110-0000124x Crankshaft Position Sensor$92.50
1x Cam Sync Distributor120-000031x Cam Sync Distributor$125.00
Aluminum Sealed Vortec Distributor Cap120-00005Aluminum Sealed Vortec Distributor Cap$28.00
1x LT1 Cam Reluctor and Housing Kit120-000401x LT1 Cam Reluctor and Housing Kit$220.00
LT1 Crank Key (1996-1997)120-00036LT1 Crank Key (1996-1997)$10.00
Double Row Timing Set for SBC and LT1120-00045Double Row Timing Set for SBC and LT1$110.00
LT1 Crankshaft Hub 1996-1997 Camaro/Firebird 1996 Corvette GM# 12550097120-00065LT1 Crankshaft Hub 1996-1997 Camaro/Firebird 1996 Corvette GM# 12550097$90.00


Timing Cover
The following timing covers are required with the EFI 24x system because they have provision for a crankshaft position sensor. The billet aluminum timing covers are required when using a double row timing set. The plastic Vortec timing cover is not recommended for 1995 and older SBC engines because block differences will cause it to leak.
 Part #DescriptionPriceCart Qty 
Vortec Timing Cover - Small Block120-00007Vortec Timing Cover - Small Block$50.00
SBC Billet Aluminum Timing Cover120-00013SBC Billet Aluminum Timing Cover$310.00
LT1 Billet Aluminum Timing Cover with Water Pump Drive120-00014LT1 Billet Aluminum Timing Cover with Water Pump Drive$345.00
LT1 Billet Aluminum Timing Cover without Water Pump Drive120-00015LT1 Billet Aluminum Timing Cover without Water Pump Drive$345.00
LT1 Billet Aluminum Timing Cover w/ BBC Crank Seal w/o Water Pump Drive120-00028LT1 Billet Aluminum Timing Cover w/ BBC Crank Seal w/o Water Pump Drive$365.00


Ignition Coils and Bracket Assemblies
Our LS ignition coil bracket assemblies are intended for SBC/LT1 engines with center bolt valve covers. They clear PCV, breather, and oil fill holes in the valve covers. Have your own LS coils? No problem. If they were used with an LS type PCM, they will work with the EFI 24x conversion.
 Part #DescriptionRecommendedPriceCart Qty 
SBC/LT1 Ignition Coil Bracket Assemblies120-00025SBC/LT1 Ignition Coil Bracket AssembliesYES$590.00
SBC/LT1 Ignition Coil Bracket120-00026SBC/LT1 Ignition Coil BracketNO$125.00
Coil Harness for SBC/LT1 Ignition Coil Bracket100-00453Coil Harness for SBC/LT1 Ignition Coil BracketNO$100.00
Bolt Kit for SBC/LT1 Ignition Coil Bracket120-00027Bolt Kit for SBC/LT1 Ignition Coil BracketNO$15.00
LS Ignition Coil - Stamped 12573190  110-00002LS Ignition Coil - Stamped 12573190 NO$55.00
Ignition Coil Connector Pigtail100-00510Ignition Coil Connector PigtailNO$10.75


PCM, ECM, and TCM
We recommend keeping the conversion simple by using the 2001-2002 LS1 PCM (GM# 12200411). This PCM is capable of cable or electronic throttle control, 4L60E or 4L80E transmission control, and is popular among tuners. If you are determined to use the 2005-2006 E40 ECM, you will have knock sensor mounting issues and require a separate transmission controller (TCM) for 4L60E transmissions.
 Part #DescriptionRecommendedPriceCart Qty 
*USED* LS1 PCM - GM# 12200411110-00003*USED* LS1 PCM - GM# 12200411YES$110.00
*USED* LS1 PCM Bracket - 1999-2002 F-Body120-00063*USED* LS1 PCM Bracket - 1999-2002 F-BodyNO$50.00


Tuning and Scanning Equipment
We are an EFILive reseller (and primarily tune with EFILive), but would alternatively recommend HPTuners, TunerCat OBDII, or LS1Edit for LS1 PCM tuning.
 Part #DescriptionRecommendedPriceCart Qty 
EFILive FlashScan V2 Scan And Tune - GM Tuning Option140-00002EFILive FlashScan V2 Scan And Tune - GM Tuning OptionYES$899.00
DashDAQ-XL with Navigation Package140-00001DashDAQ-XL with Navigation PackageNO$0.00


Engine Wiring Harnesses
While EFI Connection often builds custom harnesses to suit the engine/transmission installation, there are some harnesses that are more routine. If your project requires an engine harness other than what is listed below, please contact us for a quote and estimated build time. All engine harnesses are built as they are ordered; in other words we do not typically have stock on any particular harness. Build times vary depending on the amount of work in the shop.
 Part #DescriptionPriceCart Qty 
24x TPI Engine Harness - Cable Throttle100-0047224x TPI Engine Harness - Cable Throttle$675.00
24x TPI Engine Harness - Electronic Throttle100-0047324x TPI Engine Harness - Electronic Throttle$750.00
24x LT1 Engine Harness - Cable Throttle100-0047424x LT1 Engine Harness - Cable Throttle$675.00
24x LT1 Engine Harness - Electronic Throttle100-0047524x LT1 Engine Harness - Electronic Throttle$750.00
24x Third Gen 1985-1992 Camaro/Firebird Engine Harness - Cable Throttle100-0047624x Third Gen 1985-1992 Camaro/Firebird Engine Harness - Cable Throttle$750.00
24x Third Gen 1985-1992 Camaro/Firebird Engine Harness - Electronic Throttle100-0047724x Third Gen 1985-1992 Camaro/Firebird Engine Harness - Electronic Throttle$800.00
24x Fourth Gen 1993-1997 Camaro/Firebird Engine Harness - Cable Throttle100-0047824x Fourth Gen 1993-1997 Camaro/Firebird Engine Harness - Cable Throttle$850.00
24x Fourth Gen 1993-1997 Camaro/Firebird Engine Harness - Electronic Throttle100-0047924x Fourth Gen 1993-1997 Camaro/Firebird Engine Harness - Electronic Throttle$925.00


Electronic Throttle
Electronic throttle is not required. Most EFI 24x conversions are using cable throttle with TPI and LT1 throttle bodies. The benefits of electronic throttle are electronic cruise control and more/faster throttle area adjustment for smoothing out idle with aggressively cammed engines. The drawback to electronic throttle is the extra expense. Electronic throttle is based on LS1/LS6 Corvette or LS Truck equipment; this means that a throttle actuator control module (TAC) and electronic pedal are required.
 Part #DescriptionPriceCart Qty 
52mm Electronic Throttle Body for TPI/LT1120-0001152mm Electronic Throttle Body for TPI/LT1$1100.00
58mm Electronic Throttle Body for TPI/LT1120-0001058mm Electronic Throttle Body for TPI/LT1$1100.00
Mono Blade Electronic Throttle Body for TPI/LT1120-00009Mono Blade Electronic Throttle Body for TPI/LT1$1150.00
TAC Module - LS1/LS6 Corvette and LS6 CTS-V110-00019TAC Module - LS1/LS6 Corvette and LS6 CTS-V$750.00
Accelerator Pedal Assembly - LS6 CTS-V110-00020Accelerator Pedal Assembly - LS6 CTS-V$150.00