Engine options include LS1-LS2-LS3-LS7 in GM's Automotive Line and 5.3L-6.0L-L92-L9H for GM's Truck Line. The GM Performance Line offers the 480 & 525 Horse Power LS3s plus the LSx 376 and the LSx 454. Horse power options for the factory and performance LS engines range from 300 to 665. SPS offers custom builds using aluminum block and the more serious LSx block. For the budget-minded, there are some good used take-out engine available at great prices.

Transmission options include 4L60E- 4L70E-4L80E-4L85E and the new 6L80E & 6L90E 6-speed automatic transmissions. Manual transmissions such as the T56 Magnum and TKO600 are also available. SPS provides transmission that use a standard slip yoke, where as the production units use a fixed yoke that requires a 2- piece driveshaft. The 6-speed automatic can be used with a paddle shifter for those who want to shift the transmission without the use of a clutch. For high-horsepower engines, custom transmissions can be built to handle to extreme power and torque. Our stock torque converters work great with most engines and we have high-stall converters for our big cam engines. When setup correctly, these high-stall converters provide great gas mileage and work just fine on the highways. SPS will pair your engine and transmission with the converter that will work best for you.

All engine management harnesses are custom made to fit each engine/transmission package. Along with the harnesses that we offer, SPS also offers GM Factory ECMs (Engine Control Modules) and TCMs (Transmission Control Module) and custom programming. Each harness comes with Check Engine Light and Factory Diagnostic Plug which can be scanned by any shop with the right equipment. We also offer Holley ECM Controllers and harnesses for automatic or manual transmissions as well as FAST Electronics and Comp-U-Shift transmission controllers. Along with the LS engines harness, SPS now offers Harnesses and ECM Programming for the LT1 line.

SPSeries: LSX427 with Dual Plenum Intake

LSX427 with Holley Dual Plenum Intake and twin throttle bodies for marine/airboat use. 625 ft-lbs of torque.

ProSea: LSX427 with Magnuson TVS2650 & 10-Rob Billet Serpentine System

Check out Blaine's airboat powered by our LSX427 with Magnuson TVS2650 Supercharger and billet aluminum 10-rib serpentine system design for marine/airboat use. 1000+ Horsepower.

Rob's 1955 Chevrolet Bel Air

What we have here is an absolutely beautiful 1955 Chevrolet Belair 2 door post car. Rob chose to send the '55 to SPS for the LS conversion. We installed a 535 horse power Street Rod LS376/535 with a 4L70E trans. For cooling SPS provided a custom core support all aluminum direct bolt in with a double pass extra large all aluminum radiator, dual 13" fans and extra large condenser. SPS upgraded the front suspension to Heidts upper and lower control arms, 2" drop front spindles and front sway bars. Wilwood 4 piston calipers were installed again on all 4 corners with drilled and slotted rotors. Got to ride in comfort so what else but Vintage Air with factory installed louvers. Other updates include Dakota Digital Gauges and Moser Ford 9" rear end.

1966 Corvette