02/13/2026
Calling all die-hard Honda fans! This 2015 Honda Civic Si Coupe is an absolute beastâfully transformed with premium aftermarket upgrades worth around $14,000 in added value. It's been through a complete performance makeover and is Hondata-ready, so the next owner can flash and tune it to their exact preferences (pump gas, E85, high-boost mapsâyou name it).
Here's a rundown of the killer mods:
Big Ball Bearing Garrett Turbo with T51R Mod (that classic whistle on spool-up!)
PRL Full Catless Downpipe to 3" Exhaust
Precision 44mm Wastegate with Dump Tube
Billet Torque Mount
Lightweight Flywheel paired with Stage 4 Clutch
Upgraded Clutch Slave & Master Cylinders with Braided Lines
RBC Intake Manifold
PRL Throttle Body Adapter
PRL Cold Air Intake
Tial Blow-Off Valve
AEM True Boost Gauge
Acuity K-Series Billet Shifter with Cables
ID1050 Injectors
Walbro 450 LPH Fuel Pump
K-Tuned Fuel Rail with Gauge and AN Lines
Full Aero Kit
Rear Diffuser
LED Headlights
Fresh Timing Chain and Tensioner
BC Racing Full Body Coilovers
Acuity Throttle Pedal Spacers
This Si is completely rust- and salt-freeâbody, frame, and undercarriage all pristine, straight from a salt-free environment. As Honda enthusiasts know, the 2.4L K24Z7 in the 9th-gen Si (especially the 2015 models with the refined 205 hp tune) is widely regarded as the peak of naturally aspirated Si performance before the turbo era beganâmore low-end torque than the 8th-gen K20, reliable K-series DNA, and huge aftermarket support for builds like this. Ready to own a tuned, turn-key monster?
Give me a call at 920-248-9211âhappy to answer questions, share more details, or set up a viewing! Shawn
Quick 1-minute YouTube video showcase: https://youtu.be/1kFQKghtL8s
62 high-res photos here: https://www.starkonthebeltline.com/details/used-2015-honda-civic/117085156
Let's get this thing in the hands of someone who'll appreciate itâVTEC (and turbo) forever!
2015 Honda Civic Si **FOR SALE** By Stark on the Beltline - Stark on Highway 19 - 502 W Main St Marshall, WI