Chevy / ARH Longtubes for 18+ ZL1

FoundNemo · 11-04-2019, 07:02 AM

Has anyone swapped to the ARH / Chevy longtubes listed for the LT1/LT4 applications with cats or without? Curious if they need a tune, power gains on stock tune/boost, and why Chevy would list them unless they dont require a re-tune on 93/etc. The performance/offroad only i think is due to the emissions standpoint more than tune I would guess.

There is no mention of tuning needed etc or performance gains (although their concept package showed an intake, these headers, pulley and eLSD calibration to run 10 flats with big/littles).

https://www.chevrolet.com/performanc...maro/drag-race (see middle of page)

https://americanracingheaders.com/pr...up-long-system

TJay74 · 11-04-2019, 07:09 AM

I have the ARH long system catless headers on my car, had them for almost 3 years now. Very high quality system and had zero issues with them.

With that, they will require a tune. You cant bolt them up to the car and just use them, especially if you go with the catless versions as there are at least 10 SES codes that will need to be turned off related to the rear O2 sensors.

FoundNemo · 11-04-2019, 07:33 AM

Thanks much!

Can'tHave2MuchHP · 11-04-2019, 07:42 AM

Headers need a tune. Gain very little on their own. Necessary mod for more power however. Get the ARH Long System. I recommend cat-less.

SJFGTO · 11-04-2019, 08:10 AM

I have the 2 inch ARH LTs, catless with the long system. The quality is excellent and the fit is perfect, no problems. As stated, all long tubes require a tune. You are not only leaving most of the power gain on the table, you risk running too lean which is trouble for your engine.

Torquem · 11-04-2019, 12:12 PM

Lean is Mean!!!!!
Until you cook heads. Then Lean is dead.

Heartbreaker · 11-04-2019, 01:49 PM

Quote:

Originally Posted by FoundNemo

Has anyone swapped to the ARH / Chevy longtubes listed for the LT1/LT4 applications with cats or without? Curious if they need a tune, power gains on stock tune/boost, and why Chevy would list them unless they dont require a re-tune on 93/etc. The performance/offroad only i think is due to the emissions standpoint more than tune I would guess.

There is no mention of tuning needed etc or performance gains (although their concept package showed an intake, these headers, pulley and eLSD calibration to run 10 flats with big/littles).

https://www.chevrolet.com/performanc...maro/drag-race (see middle of page)

https://americanracingheaders.com/pr...up-long-system

I have ARH 1 7/8 into high flow cats deleted secondaries into the stock muffler. Got a tune. Also with RotoFab CAI and Mamo TB. We have emissions testing in TN. System works well and sounds good. Under full throttle about 104 dB

jbp8653 · 11-04-2019, 02:22 PM

How much power can you expect to pick up with just headers and a tune?

TJay74 · 11-05-2019, 09:20 AM

Quote:

Originally Posted by jbp8653

How much power can you expect to pick up with just headers and a tune?

About 25rwhp...

11-04-2019, 07:02 AM	#1
FoundNemo Drives: 2019 ZL1 Join Date: Oct 2019 Location: GA Posts: 573	Chevy / ARH Longtubes for 18+ ZL1 Has anyone swapped to the ARH / Chevy longtubes listed for the LT1/LT4 applications with cats or without? Curious if they need a tune, power gains on stock tune/boost, and why Chevy would list them unless they dont require a re-tune on 93/etc. The performance/offroad only i think is due to the emissions standpoint more than tune I would guess. There is no mention of tuning needed etc or performance gains (although their concept package showed an intake, these headers, pulley and eLSD calibration to run 10 flats with big/littles). https://www.chevrolet.com/performanc...maro/drag-race (see middle of page) https://americanracingheaders.com/pr...up-long-system

11-04-2019, 07:09 AM	#2
TJay74 Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016 Location: Norman, OK Posts: 2,424	I have the ARH long system catless headers on my car, had them for almost 3 years now. Very high quality system and had zero issues with them. With that, they will require a tune. You cant bolt them up to the car and just use them, especially if you go with the catless versions as there are at least 10 SES codes that will need to be turned off related to the rear O2 sensors. __________________ 2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp 2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD

11-04-2019, 08:10 AM	#5
SJFGTO Oh Oh it's Friday Night! Drives: 2018 ZL1 1LE Nightfall Gray Join Date: Jan 2018 Location: Walton Woods Posts: 1,061	I have the 2 inch ARH LTs, catless with the long system. The quality is excellent and the fit is perfect, no problems. As stated, all long tubes require a tune. You are not only leaving most of the power gain on the table, you risk running too lean which is trouble for your engine. __________________ 2018 Camaro ZL1 1LE NFG; ARH 2” headers, catless mids, ARH full exhaust, Lingenfelter 18% lower pulley, ATI Harmonic Balancer, Roto-fab CAI, EE-catch can, TM ported TB, NX Lid, BMR strut tower brace. Aeroforce dual pod interceptor gauges. Tuned by Vengeance Racing!!! 644 HP @ 6250 rpm / 689 trq @ 3660 rpm Four that wanna own me Two that wanna stone me One says she's a friend of mine...

11-04-2019, 12:12 PM	#6
Torquem Bannable Drives: 2017 Camaro ZL1 Join Date: Oct 2009 Location: Houston, TX Posts: 460 View My Garage	Lean is Mean!!!!! Until you cook heads. Then Lean is dead. __________________ One must forego the self to attain total spiritual creaminess, and avoid the chewy chunks of degradation 2017 ZL1 A10 - Hyper Blue Metallic Rotofab CAI, TM ported TB, AWE non res touring catback with PLP's

11-04-2019, 02:22 PM	#8
jbp8653 Drives: 2017 ZL1,2013 ZR1, 1952 C3100 Resto Join Date: Jun 2017 Location: Gibsonton, Fl Posts: 168	How much power can you expect to pick up with just headers and a tune? __________________ 2017 ZL1,Mosaic Black, auto,nav/pdr, Roto Fab,Mamo 2013 ZR1 60th Anniv. 1952 C3100 resto-rod. LS6, 4L60e, 228R cam

11-04-2019, 07:33 AM	#3
FoundNemo Drives: 2019 ZL1 Join Date: Oct 2019 Location: GA Posts: 573	Thanks much!

11-04-2019, 07:42 AM	#4
Can'tHave2MuchHP Drives: Fast Join Date: Mar 2015 Location: Michigan Posts: 3,696	Headers need a tune. Gain very little on their own. Necessary mod for more power however. Get the ARH Long System. I recommend cat-less.

User Name		Remember Me?
Password