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.
Features:
- 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.
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. |
- 1990-1995 4Runners w/ Coil Rear Suspension
To open a printable PDF version of this instruction CLICK HERE
This Pro Flow Exhaust System is designed to fit 1989 to 1995 4Runners with 22R/RE and 3VZ engines and rear coil spring suspension.
NOTE: This exhaust kit will not fit leaf sprung 4Runners and will only work with a 17.5" catalytic converter (or test pipe).
Installation:
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1. Remove the stock exhaust system from the catalytic converter on back. Be careful not to damage the hangers or brackets.
2. Install the muffler into the stock hangers. The offset side of the muffler goes towards the back of the vehicle so that the hangers also point towards the rear of the vehicle.
3. Attach the tailpipe section using a 2-bolt flange gasket. Bolt to the muffler and attach rear hanger. Do not tighten yet.
4. Check alignment and location of muffler and tailpipe. Hangers may require a slight adjustment for proper alignment.
5. Connect front pipe to back of catalytic converter using a 2-bolt flange gasket.
6. Check the clearance of your Pro Flow Exhaust System to the floor pan, chassis components, parking brake cable assembly, driveshaft, etc. Adjust system as needed.
7. Starting at the muffler, tighten bolts working towards the front and back.
8. Start engine and check for exhaust leaks. Tighten flanges and clamps as needed.

14 Reviews Hide Reviews Show Reviews
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Perfect fit
Excellent quality & perfect fit! Very easy install with no fitmet issues at all.
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Excellent product
Easy to install, zero fitment issues, all the hardware was top of the line and fit perfectly.
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CAT BACK
Recently purchased the complete exhaust for my 2D Gen 4-Runner. All components were perfect and installed with little to no trouble. Only issue was getting everything from the header to the tail pipe was the connector pipe. The Cat back system mentioned it worked with the 17" CAT. Replacing everything I went with the 17" CAT (mine was 12"). My issues was the connector pipe between the header and CAT had to be trimmed to fit properly. Other than that, perfection in every way.
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Pro Flow Exhaust System 4Runner 1989-1995
This was not the only item I ordered however, This exhaust system is easy to install and sounds great! Especially when you get the matching cat! I'm giving it 4.5 stars because the nuts and bolts that were included were impact style and either stripped as they got further on the bolt with tightening or snapped before getting near closing the gap or tightening all the way. I was able to find fine thread grade 8 replacements and used lock washers to make sure they don't come loose. I would have appreciated a note in the description if not including the need for a Block-Off Plate kit for those who own non-compliant/49 state models with no downstream O2 sensor. Thanks again for your excellent customer service and services!