Pro Flow Exhaust System 2nd Generation 4Runner 1990-1995
Pro Flow Exhaust System 2nd Generation 4Runner 1990-1995
Our Price: $556.15

Quantity in Stock:(Backordered)

NOTE: Usually Ships in 24-72 Hours
Part Number: 1042009

Details Fitment Instructions

Pro Flow Exhaust System

LC Engineering’s Pro Flow Exhaust Systems are made with 409 stainless steel tubing, a 409 stainless steel straight-through Street Max muffler and 3/8" thick mild steel flanges. The straight-through design of the Street Max muffler delivers a deep performance tone without the excessive interior drone or high-pitched external sound frequencies (rasp) while providing optimal flow for improved horsepower & torque. They are then ceramic coated for long-lasting good looks and protection from the elements. LC Engineering designs our kits to be a direct fit application that requires little or no modifications and uses factory exhaust hanger locations. This bolts up behind your factory catalytic converter or one of our high flow performance catalytic converters. This exhaust system features 2 1/4" tubing with a 3" polished stainless tip. Every kit is shipped complete with all the instructions and hardware you will need for a quick and easy installation process.


  • Straight-Through Design
  • 409-Grade 16 -Gauge Stainless Steel Construction
  • Delivers A Deep Performance Tone
  • High-Heat Thermal Mesh
  • Improved Horsepower & Torque
  • Effective Drone Reduction
  • 3 Year Limited Warranty (Muffler)

NOTE: Designed to be used with a 17" catalytic converter. LC Engineering does NOT recommend wrapping our exhaust with any sort of exhaust wrap. Doing so will increase the likelihood of a premature failure of the exhaust, as it holds contaminants to the exhaust tubing and increases the chances of corrosion. Exhaust wraps will void any and all warranty claims.

Contact our Tech Support Line for further information at 928-855-6341.

Note: Images are for illustration purposes only. Images may not represent the product listed. Please contact customer service with any questions or concerns: 1-928-505-2501.

Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 14 Write a review.

  0 of 0 people found the following review helpful:
5 of 5 Exhaust pipes October 31, 2022
Reviewer: Richard Goodall from Portland, OR United States  
System bolted in very nicely.

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  0 of 0 people found the following review helpful:
5 of 5 Great Quality Product October 12, 2022
Reviewer: Evan Liming from Albuquerque, NM United States  
I bought the Pro Flow Exhaust System and Free Flow Catalytic Converter about 2 weeks ago. I needed to replace the catalytic converter and my existing cat back was looking a little old and tired, so I bought both. Luckily my old system and cat weren't hard to get off, they simply unbolted. The hardest part was getting the system off the rubber hangers and getting the gaskets inside the flange without them falling out before tightening the bolts on the new system. Took about 3 hours, removal and installation. After driving it for about a week, I've noticed that my exhaust flows better, the throttle responds better to my input (might be because of the old clogged cat), and the sound is more prominent. It's certainly louder than stock, but not too loud. It has a nice deep note that actually starts to quiet down above 3k rpm, which will be good for long highway trips. I'm guessing it will help qith fuel economy, but not by much. I'm very impressed with the fit and quality of the system.

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  0 of 0 people found the following review helpful:
5 of 5 Make a 3vze header set September 23, 2022
Reviewer: Braiden Blushi from placentia, CA United States  
/i love your products but you guys need to bring back the full header set

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  0 of 0 people found the following review helpful:
5 of 5 90 4 runner fitment July 11, 2022
Reviewer: Kenneth Wilhelm from Wellton, AZ United States  
This has got to be the easiest thing I have put in a 4 runner thus far. I broke the rear tailpipe hanger taking off the old exhaust.  wouldn’t you know it, there was one in the box. Everything fit like a glove and only took me about 20 minutes from start to finish. It sounds great.

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  0 of 0 people found the following review helpful:
5 of 5 Awesome product!! April 25, 2022
Reviewer: BR from Rogue River, OR United States  
Literally the only 2nd gen bolt on exhaust system available, and it is exactly what my Runner needed - well worth the price, and it showed up quicker than I was expecting. Will happily deal with LCEngineering again once my 3.4 swap is finished!

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