Performance Engine Kits

Stage 1 Performance Head, 27mm-25mm Valves

Stage 1 Performance Head Kit for small block clone engines.  This Stage 1 Performance Kit comes with: 27mm & 25mm Steel Valves 18# Valves Springs Automotive Style Keepers and Retainers 5.5mm stem valves    

Mini-Mid Stage 1 Performance Kit

Add 2-3 more Horse Power to your TrailMaster Mini/Mid/Blazer200R/Cheetah8 Go-Kart with the Mini-Mid Stage 1 Performance Kit from GoPowerSports.  This easy bolt-on kit will bring your go-kart to life.  The double baffled muffler will help keep...

Stage 1.5 Tillotson Performance Kit

The Stage 1.5 Tillotson Performance Kit is great for those who want to take their Tillotson 212 Engine to the next level on a budget.  You get the essential items for more horse power.  In order to use this kit, you must use with either a Stage...

MoFlow1 Billet Cylinder Head Kit 14cc, GX200

Billet cylinder head for small block GX200 Clone Engines 32mm intake and 25mm exhaust Optimized flow and velocity 14cc combustion chamber (Best choice for methanol / experienced builders) Supports .500" lift with no modifications Aftermarket...

MoFlow1 Billet Cylinder Head Kit 18cc, GX200

Billet cylinder head for small block GX200 Clone Engines: 32mm intake and 25mm exhaust Optimized flow and velocity 18cc combustion chamber (Best Choice for gas builds) Supports .500" lift with no modifications Aftermarket pushrods required Comes...

Stage 2: Predator 223/224 Performance Kits

Upgrade your Predator 223 or Predator 224 Engine with this exclusive Stage 2 Kit from GoPowerSports.  Swap out your cast internals for durable billet aluminum.  This complete kit will add plenty of Horse Power to your engine to make you grin...

Stage 2: Predator 212 Ghost Performance Kit

Build your Predator 212 GHOST engine with this exclusive Stage 2 Kit from GoPowerSports.  The stock Predator engines are not meant for hard racing.  This kit replaces all of the soft cast parts with strong billet aluminum which is guaranteed to...

Performance Short Block 212cc

This Performance Short Block is everything you wanted in a DIY 212cc short block. This engine comes with a billet rod, governor removed, and the piston/rings installed and race ready. Did you recently damage your engine? Are you looking for a more...

3'' Tillotson Block Kit

This Block is  for experienced engine builders  We took the Tillotson block and re-sleeved it to 3"+ and have it finished honed for the Wiseco piston 1543M07593 (2.990").  This kit includes: -3" Tillotson Block -Wiseco 2 ring...

Stage 1 Performance Kit for 301/420cc Engines

Our Stage 1 Performance Kit is very popular and includes a K&N style high flow air filter, aluminum air filter adapter, and an upgraded drilled main jet for the carburetor. This kit is a simple but very effective upgrade over the...

Stage 2: Tillotson 212 Performance Kit "Racer"

Stage 2 "Racer" kit for the Tillotson 212E Pull Start Engine.  (You can put this on the Electric Start Tillotson 212EE, but you would lose the electric start function when swapping out flywheels)  For those who want to race and/or in search of...

Stage 2: Tillotson 212 Performance Kit "Cruiser"

Stage 2 "Cruiser" kit for the Tillotson 212E Pull Start Engine.  (You can put this on to the Electric Start Tilloston 212EE, but you will lose your electric start capabilities when you change the flywheel). If you are looking to cruise the streets...

Stage 2: 196cc Clone Performance Kit "Racer"

No Returns on this product.  If you have questions, please call or email for clarification. Stage 2 "Racer" kit for the 196cc Clone Engine.  For those who want to race and/or in search of more RPMs than the mild Mod2 Cam.  This kit...

Stage 2: 196cc Clone Performance Kit "Cruiser"

No Returns on this product.  If you have questions, please call or email for clarification. Stage 2 "Cruiser" kit for the 196cc Clone Engine.  If you are looking to cruise the streets but still want more power than the Stage 1 kit, then this...

Stage 2: 212cc Hemi Predator Performance Kit "Racer"

No Returns on this product.  If you have questions, please call or email for clarification. Stage 2 "Racer" kit for the Predator 212cc Hemi Engine.  For those who want to race and/or in search of more RPMs than the mild Mod2 Cam.  This...

Stage 2: 212cc Hemi Predator Performance Kit "Cruiser"

o Returns on this product.  If you have questions, please call or email for clarification. Stage 2 "Cruiser" kit for the Predator 212cc Hemi Engine.  If you are looking to cruise the streets but still want more power than the Stage 1 kit,...

Stage 2: 212cc Non-Hemi Predator Performance Kit "Racer"

Stage 2 "Racer" kit for the Predator 212cc Non-Hemi Engine.  For those who want to race and/or in search of more RPMs than the mild Mod2 Cam.  This kit includes Billet Aluminum replacement parts to withstand the power from the Hot .265 Cam...

Stage 2: 212cc Non-Hemi Predator Performance Kit "Cruiser"

No Returns on this product.  If you have questions, please call or email for clarification. Stage 2 "Cruiser" kit for the Predator 212cc Non-Hemi Engine.  If you are looking to cruise the streets but still want more power than the Stage 1...

Stage 1 Performance Kit for 196cc/212cc Engines

Our Stage 1 Performance Kit is a simple but effective upgrade over the stock air box and exhaust. With the added air flow, the richer main jet (.038) is mandatory for optimal engine performance.  To complete the Stage 1 Performance...

225cc/228cc Short Block Kit, U-Build-It

GoPowerSports exclusive kit with a custom GPS long rod (for more torque) and a forged lightweight 72mm racing piston. Build it to fit your specific needs with your choice of crankshafts, camshafts, and side cover! This kit comes as individual parts and...