Is over pipe worth getting after installed header? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

stlgrym3 · 04-09-2018, 05:29 PM

Had my Tomei header installed and tuned to OFT Stage2+, it sounds so sweet along with my Greddy SP catback. Now I’m thinking about getting Tomei over pipe, it’ll free up the flow behind the manifold even more. Not planning on doing the front pipe, do not want to lose the only cat that’s remaining lol. Is upgrading the over pipe worth the couple hundred bucks of investment?

Second question, if I do get the over pipe does OFT Stage2+ still work, or do i need to get custom tune?

MRCA1ST · 04-09-2018, 05:42 PM

I installed a (high flow) catted FP and OP prior to my UELs and there was a slight difference in throttle response/pickup...I spend a lot of time cruising in 6th gear and when I needed to pass someone I repeatedly (over the first few days following install) thought I had left it in 5th and not gone up to 6th before setting CC, only to look/feel that I was indeed in 6th gear.

With all of that being said, not sure if you will notice that difference if you already have headers and a tune. I wouldn't think it would be worth the $$ for one of the more expensive OPs. I went the cheap route on my OP/FP and got 2.5" high flow catted FP and OP for under $250 shipped (Ebay - SRS Exhaust). I haven't seen anyone else running them on here, but I was super happy with the quality/fitment and so far they have held up just fine. They have a pretty extensive parts list for DSMs and get good reviews in that world, and those guys can be savage.

Kodename47 · 04-09-2018, 07:04 PM

A tuner in the UK tested changing the OP in a NA car, it made no power change at all.

asdf · 04-09-2018, 07:27 PM

Have read on the forums that overpipe does not do much, if anything.

More gains to be had if you swap out the front pipe, but that will make a noticeably audible difference and [as you noted] will remove the last remaining cat on our cars...

Teseo · 02-25-2023, 11:28 AM

Quote:

Originally Posted by MRCA1ST

I installed a (high flow) catted FP and OP prior to my UELs and there was a slight difference in throttle response/pickup...I spend a lot of time cruising in 6th gear and when I needed to pass someone I repeatedly (over the first few days following install) thought I had left it in 5th and not gone up to 6th before setting CC, only to look/feel that I was indeed in 6th gear.

With all of that being said, not sure if you will notice that difference if you already have headers and a tune. I wouldn't think it would be worth the $$ for one of the more expensive OPs. I went the cheap route on my OP/FP and got 2.5" high flow catted FP and OP for under $250 shipped (Ebay - SRS Exhaust). I haven't seen anyone else running them on here, but I was super happy with the quality/fitment and so far they have held up just fine. They have a pretty extensive parts list for DSMs and get good reviews in that world, and those guys can be savage.

How is holding up your OP/FP combo?

jflogerzi · 03-02-2023, 01:19 PM

honestly no

RToyo86 · 03-02-2023, 01:37 PM

Old thread but I'll comment anyways. OTS tune leave some power on the table. Money is better spent dialing in a custom tune than buying the OP running a OTS tune.

I did this when I installed gruppe-s header. Bought the header from a friend and was supposed to get the OP but his was buggered, so I ordered one and installed the header anyways.

Then pulled the header and installed the overpipe. I could not feel any difference but it was a piece of mind mod. Maybe it's slightly measurable on a dyno with tuning but not enough for your butt to notice.

Similar thing when I swapped over to a JDL 4-2-1 EL. Ordered a 2.5"OP(63mm) to replace the gruppe-s 2.36"(60mm) OP and after logging my tuner didn't notice any difference he could exploit.

04-09-2018, 05:29 PM	#1
stlgrym3 Senior Member Join Date: Nov 2011 Drives: 2017 Subaru BRZ Limited Location: socal Posts: 562 Thanks: 72 Thanked 51 Times in 44 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Is over pipe worth getting after installed header? Had my Tomei header installed and tuned to OFT Stage2+, it sounds so sweet along with my Greddy SP catback. Now I’m thinking about getting Tomei over pipe, it’ll free up the flow behind the manifold even more. Not planning on doing the front pipe, do not want to lose the only cat that’s remaining lol. Is upgrading the over pipe worth the couple hundred bucks of investment? Second question, if I do get the over pipe does OFT Stage2+ still work, or do i need to get custom tune?

04-09-2018, 07:04 PM	#3
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,629 Times in 1,112 Posts Mentioned: 155 Post(s) Tagged: 1 Thread(s)	A tuner in the UK tested changing the OP in a NA car, it made no power change at all. __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

04-09-2018, 07:27 PM	#4
asdf Loading...████████] 99% Join Date: Jul 2013 Drives: #0517 Location: southern california Posts: 586 Thanks: 227 Thanked 251 Times in 171 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Have read on the forums that overpipe does not do much, if anything. More gains to be had if you swap out the front pipe, but that will make a noticeably audible difference and [as you noted] will remove the last remaining cat on our cars... __________________ R1 3 5 ╘┼┼┤ . 2 4 6

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04-09-2018, 05:42 PM	#2
MRCA1ST Senior Member Join Date: Oct 2017 Drives: 2013 WRB BRZ 6MT Location: USA Posts: 181 Thanks: 49 Thanked 105 Times in 68 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I installed a (high flow) catted FP and OP prior to my UELs and there was a slight difference in throttle response/pickup...I spend a lot of time cruising in 6th gear and when I needed to pass someone I repeatedly (over the first few days following install) thought I had left it in 5th and not gone up to 6th before setting CC, only to look/feel that I was indeed in 6th gear. With all of that being said, not sure if you will notice that difference if you already have headers and a tune. I wouldn't think it would be worth the $$ for one of the more expensive OPs. I went the cheap route on my OP/FP and got 2.5" high flow catted FP and OP for under $250 shipped (Ebay - SRS Exhaust). I haven't seen anyone else running them on here, but I was super happy with the quality/fitment and so far they have held up just fine. They have a pretty extensive parts list for DSMs and get good reviews in that world, and those guys can be savage.

03-02-2023, 01:37 PM	#7
RToyo86 Senior Member Join Date: Mar 2018 Drives: 17 Asphalt 86 Location: Ottawa Posts: 2,162 Thanks: 1,705 Thanked 2,193 Times in 1,123 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	Old thread but I'll comment anyways. OTS tune leave some power on the table. Money is better spent dialing in a custom tune than buying the OP running a OTS tune. I did this when I installed gruppe-s header. Bought the header from a friend and was supposed to get the OP but his was buggered, so I ordered one and installed the header anyways. Then pulled the header and installed the overpipe. I could not feel any difference but it was a piece of mind mod. Maybe it's slightly measurable on a dyno with tuning but not enough for your butt to notice. Similar thing when I swapped over to a JDL 4-2-1 EL. Ordered a 2.5"OP(63mm) to replace the gruppe-s 2.36"(60mm) OP and after logging my tuner didn't notice any difference he could exploit.

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