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MagnaFlow Cat Back Exhaust 3in (Part Number: )
MagnaFlow Cat Back Exhaust 3in (Part Number: )
MagnaFlow Cat Back Exhaust 3in (Part Number: )
MagnaFlow Cat Back Exhaust 3in (Part Number: )
MagnaFlow Cat Back Exhaust 3in (Part Number: )
MagnaFlow Cat Back Exhaust 3in (Part Number: )
MagnaFlow Cat Back Exhaust 3in (Part Number: )
MagnaFlow Cat Back Exhaust 3in
Subaru WRX Hatchback 2011-2014 / STI Hatchback 2008-2014
Read 3 Reviews | 6 Q&As
Part # 16824
msrp: $1,121.53

Only 3 left!

Features & Product Details

The stock exhaust system doesn't sound too terrible, but Magnaflow has one of the best ways on the market to improve the exhaust tone of that engine with this complete cat-back kit. This stainless steel exhaust system is an easy, bolt-on replacement for your factory cat-back that instantly adds an aggressive tone and extra power. The kit doesn't even require tuning or other modifications. Magnaflow's cat-back kit maintains the factory exit and does not require cutting or modifications to your rear bumper.


Brand: MagnaFlow
Exhaust Orientation: Straight Exit
Installation Hardware Included: Yes
Piping Coating: No
Piping Flex Joint: No
Piping ID: 3.00in
Piping Material: 409 Stainless
Piping Taper: No
Silencer Included: No
Tip Material: Stainless Steel
Tip Qty: 4
Tip Shape: Round
Mfgr. Warranty: Limited Lifetime Warranty
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.



3 Reviews
4.7 out of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Customer Photos and Videos
No user media. You can upload a photo or video of your install by posting a review.
2008 STI Magnaflow Cat Back 7 months ago
5out of 5stars

The good points: fast delivery, easy installation with just ramps and jack stands, sounds and looks great, even my wife likes the sound! The bad points: none
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1 of 1 people found the following review helpful
meh, sounds good.  11 months ago
4out of 5stars

let's start with the positive, the sound is great. i have this matched with a Cobb catted downpipe, i haven't noticed much drone, but a nice low rumble until you open it up. now the negative, either some of the tubes were bent in shipping, or the QC is not spectacular. the welds are passable, but certainly not great. there is a lot of spatter and slag left on surfaces. the fitment is not perfect by any means, one of the hub and spigot fittings refused to completely seat. the flange which mates to the downpipe was not flat, either warped from shipping or too much heat doing welding, which has produced a bit of an exhaust leak. lastly, one of the hangers was not well aligned with the stock hanger location. all in all, you get what you pay for. with this, you get great tone, but not great fabrication. the install would be simple if some of the fabrication was better checked.
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2008 STI Hatchback 2 years ago
5out of 5stars

I absolutely love this exhaust from Magnaflow! I installed it about 3 weeks ago and don't see myself swapping it out ever. Very nicely built, solid welds and a really unique design for assembly. Installation took about 30 minutes and that was without a lift. By far the easiest exhaust I have ever installed. With that being said, I noticed a few days ago while under a lot of torque I could hear a slight banging noise from under the car. The drive axel was rubbing against the second section of piping after the downpipe. Unlike most exhaust with the bolt together sections, Magnaflow has the slip over style so I adjusted that midpipe and plenty of clearance now! So do yourself a favor and double check to make sure the pipe has good clearance all the way back and your golden! Love this product, highly recommended.
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  • Q:  do i need a adapter  JareedSubiee2 years ago

    hey i an 2012 wrx hatch and just bought an after market down pipe 3in (Invidia ). is there and adapter that i can buy to go from the 2.5 to 3in
    • 0 of 0 people found the following answer helpful

      A:  The invidia down pipe and this catback are both 3 inches so there is no need for an adapter.

      Jared A. @ RallySport Direct 2 years ago  
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  • Q: Remap  isikan1034743 years ago

    I have already remaped decat downpipe.Do I need remap again after this catback ? Thanks..
    • 0 of 0 people found the following answer helpful

      A:  No, the catback section of the exhaust doesn't have any emissions devices and doesn't require any sort of tune.

      Chris W. @ RallySport Direct 3 years ago  
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  • Q: Fitment  StoneGR3 years ago

    This part number says it is for the sedan. Will it fit the hatch with no modification? If not what all would be needed to modify it to fit the hatch?
  • Q: Drone?  YingYang4 years ago

    I've read that you need a resonator upstream of the muffler to avoid drone. Has RSD tested this yet? Does it drone? Thanks!
    • 0 of 0 people found the following answer helpful

      A:  A resonator is not always necessary to reduce drone, and we have not personally used or tested this exhaust.

      Zach G. @ RallySport Direct 4 years ago  
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