RoadsterSport Fiat 124 HighFlow Midpipe

  • Sale
  • $899.00
  • Regular price $914.00
  • incl. GST


NOTE: We're currently taking pre-orders for this item to be included in the next container from Goodwin Racing. Please contact for estimated ETA prior to ordering.

Full 2.5 inches all the way through this mid-pipe adds both sound and faster turbo spool. Checkout the pinched factory mid-pipe below which effect overall power delivery;

Crunched Fiat factory mid-pipe reduces power

All POLISHED stainless steel construction and a 2 year warranty. Uses stock hangers. 


Also available, our Fiat 124 Abarth Quad Muffler and  J-pipe cross-over


Instruction Summary:


1. Unbolt braces blocking your access to the mid-pipe.

2. Unbolt the flange at both ends of factory mid-pipe (two bolts each).

3. Lower and remove factory mid-pipe.

4. Notice that replacement mid-pipe has a slip joint in the middle. The only mistake that folks sometimes make is that they shove the slip joint all the way together. Instead of doing that, realise that the slip joint is there as your friend so you can adjust length as you need it to match the flange of the stock header, aftermarket headers, and any muffler on the back end.

The slip joint also allows you to adjust height that the mid-pipe hangs at. Make it short to raise the mid-pipe. Make it longer to lower the mid-pipe. And move it right or left by twisting at the slip joint. With these thoughts in mind, lube up the joint with dish soap and connect two halves of the mid-pipe but keep the clamp in the middle just barely snug for now. Match the new mid-pipe to the rough length and orientation of the factory mid-pipe that you already removed by laying them side by side on the garage floor.

5. Now raise the new mid-pipe into the car, bolt the front half to the header exit, connect the single mid-pipe hanger, and thread the bolts for the rear flange connecting mid-pipe to muffler (open and slide the slip joint as needed to make this happen).

6. Now look at how it hangs. Adjust the slip flange so that the mid-pipe hangs where you want it. To tighten your bolts start at the front flange which connects to the header and get the flanges all nicely lined up evenly and then bolt those down first. Then head back and adjust slip joint until you get the flange that connects to the muffler nicely lined up and flat and bolt that flange down. Torque to about 25 foot pounds.

7. Lastly, torque the clamp that holds the slip joint and reinstall braces that you pulled for access. Slip joint bolt to just 15 foot pounds, just 10 foot pounds for the relatively small brace bolts.