The legacy of the GReddy SP lives on with GReddy’s best version yet, the Supreme SP and to prove it carries a limited lifetime warranty! From the 1st flange to the new double-wall GReddy Tip, each Supreme SP system features a high-quality, hand Tig-weld 304 stainless-steel outer construction. Within the muffler, new straight-through and directed- straight-though chambered muffler designs allow GReddy to engineer a more refine exhaust note while increasing exhaust flow and performance. Classic GReddy street performance styling is maintained with excellent fitment and a stylish exhaust system layout. The Supreme SP not only designed to perform and sound great for each specific application; it matches the vehicle’s body-lines and styling.

2017-on  Honda Civic Si 4door Sedan (only)

Designed specifically for the 10th generation (FC1) Sedan version of the Honda Civic Si, is our dual muffler Supreme SP cat-back exhaust. With similar features as our coupe version, the longer sedan version features high-flow with refined exhaust note. Under wide-open-throttle, spirited driving, the system offers the classic GReddy deep exhaust growl. To enhance the performance of the turbocharged 1.5L engine, this 3piece,  cat-back exhaust connects to the factory piping (our system bolts to the factory exhaust system at the flange behind the engine/transmission) and expands to large 3” (76mm) forward-midpipe and mid-pipe that split to two polished, straight-through SP oval mufflers and dual center-exit dual-wall GReddy tips. The sedan version has a slight more aggressive tip angle and muffler combination is a better compliment to the Si sedan’s sporty, but wide rear bumper tip opening. Like all GReddy Supreme SP systems, the fully hand-welded 304 Stainless-Steel exhausts carry a Limited Lifetime Warranty

Chassis:  FC1 4door Sedan
Engine:  L15  Turbo
Type:   3″ Cat-back with dual oval muffler with dual tips

Number of pieces: 3
Piping:   76 mm (3 “)
Tips:   2x 115 mm (4.5 “)
Gasket(s):    3 ” oval (qty: 2 included) replacement
Resonator:   Yes

Weight:  TBA lbs   (Stock weight  TBA lbs)
Sound Comparison (SAE J1169) Test:  TBA dB(a)

HP:  +TBA  hp
TRQ:  +TBA  ft-lbs