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I have the GN1 3" exhaust with the mufflers that come with it. I no longer mind driving my GN the way it sounds now. This is the best exhaust sound I've ever heard from a GN. No drone and it's a deep musclecar sound. FYI - This system is a Chinese knockoff of some other exhaust system no longer available.
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1987 Grand National 27k orig miles - 11.06 @ 123 - 3" downpipe, stock location stretch Intercooler, 60 lb injectors, TA60, Razors alky, TurboTweak SD Chip, Powerlogger with PLX wideband, Jimmy's Trans (Vigilante 5 disk lockup at 70 mph), Hoosier Drag Radials 255-50-16 |
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There is only one muffler that IS the GN sound: Pitbulls from the old ATR.
Anyone who has them will testify to this fact.
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87GN 6776bb, stock bottom end, stock heads & intake, 206/206, 60#, PTC 10" 2800 , TT, Alkycontrol 11.20@118 mph 1.71 60' @ 23 psi87 Grand National-current 87 Turbo T Limited-Sold 87 T-Type-Sold |
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I know I will get flamed for this but
I like the Flowmaster 40s they sound real nice , I know they hurt tons of HP ? I have Magnaflows on mine but still like the sound of Flowmasters better , I have never heard the sound of Pitbulls anything on youtube?
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My vote for pitbulls from ATR also.
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Best time 10.656@126.18 pump gas and alky Quickest MPH 11.31 @ 131.10 pump gas and alky Thanks Bob,Bw,TurboTweak and Alkycontrol. |
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Pypes' Race Pro here.
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86 GN, 4.1L w/steel caps & ARP stud/bolts, mildly ported 8445's & intake, 212/212 roller, GT6131E, TT chip, 60 lb'rs, RJC p/plate, 3" THDP, ATR stretched SLIC, Walbro 340 hotwired, UMI lca, ATR bar |
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Doug Martin, aka "D-HAM" Old Reliable, 1987 WE4 "Rat Rod" Best time 10.35@131mph with a stock 58mm TB/Plenum and a PT54 New combo-10.58@131 with SMC Alcohol Tuned by Anderson Performance Maryland MAGNA Representative |
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86 GN (Politically incorrect w/87 Grill) 2800 PTC, Lonnies Stage 1 2004R, MSD 50's, 340 Walbro+hotwire, Duttneck SLIC, Stevemon TB+Plenum, Hooker Duals, Sitting on BFG's 87 Grey-T 6152E, Champion heads/Intake, 218/218 Comp Roller, T&D Rockers, Alkycontrol, Accufab TB & Plenum, 65 pounders, Reds Double pumper, MAFT-PRO, LS1 MAF, Powerlogger, LC-1 Wideband, Stretch SLIC, THDP, ATR duals, Art Carr 2004R, CPT 9" 3200 N/L, H&R Swaybar/LCA/UCA, MT Street Radials... |
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When someone hears your car on the street they know for sure that there is something nasty under the hood.
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87GN 6776bb, stock bottom end, stock heads & intake, 206/206, 60#, PTC 10" 2800 , TT, Alkycontrol 11.20@118 mph 1.71 60' @ 23 psi87 Grand National-current 87 Turbo T Limited-Sold 87 T-Type-Sold |
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Any sound clips of the Pitbulls? On YouTube I heard a GNX on the showroom for sale that sounded great . Anyone local have these mufflers?
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Denis Kefallinos 86 GN On my third set of head gaskets |
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I have to agree about the ATR Pitbull mufflers sounding great on a GN. They give the car a unique sound that is all it's own. However if you don't want to be noticed while driving down the street you had better forget about the ATR Pitbull mufflers.
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'87 GN Stock unopened long block with a few bolt-ons: GT6152E, Mototron 60#, Alky Control, MAFT Gen2 with Extender Extreme and LC1 WB, hot wired Walbro, AFPR, Cartek FMIC, Tomka CAI, Terry Houston DP, ATR 3" single shot, PI Vigilante 3200 L/U, RJC boost controller and power plate, Scanmaster, Power Logger 11.36 @ 116.97 MPH |
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An all black, black window, hood bulging, 500HP regal...not being noticed?
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87GN 6776bb, stock bottom end, stock heads & intake, 206/206, 60#, PTC 10" 2800 , TT, Alkycontrol 11.20@118 mph 1.71 60' @ 23 psi87 Grand National-current 87 Turbo T Limited-Sold 87 T-Type-Sold |
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'87 GN Stock unopened long block with a few bolt-ons: GT6152E, Mototron 60#, Alky Control, MAFT Gen2 with Extender Extreme and LC1 WB, hot wired Walbro, AFPR, Cartek FMIC, Tomka CAI, Terry Houston DP, ATR 3" single shot, PI Vigilante 3200 L/U, RJC boost controller and power plate, Scanmaster, Power Logger 11.36 @ 116.97 MPH |
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Bump, I wanna hear what these sound like too. I currently have the GN1 exhaust.
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Dave @ Gbodyparts.com Dirt Cheap Turbos. Priced so low you'll slap your mama and kick a puppy ![]() Racecar #1 87 T-Type (under the knife, Again) Racecar #2 93 nissan 240sx cp / Gbodyparts delivery service (at least its a rwd import) 16.3@83mph
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I love the Pypes RacePros on my car. They sound great and have no drone. I used to have an SLP muffler, side outlet exhaust on my car, and it was the best sound from any gn I have ever heard, but it was the worst drone, and muffler was smashed from previous owner so it had to go.
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86 T-Type: TE44/ATR FMIC/50 lb Injectors/TRW .20/Billet Mains/Blueprinted Motor/204-214 Edlebrock Cam/Ported and Polished Heads with Matched Intake/3" THDP/Pypes Performance SS Exhaust System with RacePro Mufflers/TR Custom Parts Big Mouth and MAF Pipe/TT Chip/Translator 6.2 with 3" LT1 Impala SS MAF/Accufab FR/RJC PP/C2 Gauges/Scanmaster/Dynotech Trans/Pats 10" 3000 Stall Converter/3.42 Gears(now)/Taylor 409 Wires/Vac. Brakes Conversion/Turbonetics Boost Controller inside vehicle/UMI Upper and Lower Control Arms/Front and Rear Suspension....All NEW! Link for photos of car: From Recent to 2003 http://s50.photobucket.com/albums/f3...uick%20T-Type/ |
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Had Hooker and hated them..... My TTA loved the Pitbulls and I did too.
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They are even on sale.
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1987 Turbo T Dark Blue Blackout Astroroof, Don Cruz Built 109, PTE Billet 71 DBB HPS T4, Forged Bottom End, 2xx/2xx Cam, RJC Girdle, TA Headers, DLS Ext. Oiling Sys., Champion GN1R, Champion Rails, PTE 95 Lb. Inj., RJC I-475 FMIC, JW Racing 3.5 DP, XFI, AMS 1000, Co2, Meriere Water Pump, RJC Pulleys, PTE Plenum, Accufab 70 TB, Tial 44 WG, Tial 50 BOV, JW Racing Cold Air, Razor's Dual Alky, Alum. Rad. Dual Spal Fans, 140 Billet Alt., PTC 9.5, Extreme All Billet Rollerized 2004R, JW Racing Mini-Tub, Custom DS, H&R Sway Bar, H&R Upper/Lower, HR MM, SC&C Upper/Lower, TA Girdle, Eaton Posi, Moser Axles, Adj. Varishocks, Aerospace, AC/Heat, NO CAGE..... Street Car. XFI Tuned By Otto. www.ottosperformance.com ![]() |
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The GN1 mufflers are copies of the old ATR mufflers. I have them on my car and like I said above my only complaint about a GN was the sound, until I put these mufflers on. It's the best sounding muffler I've ever heard on a GN hands down! You're welcome to come by and hear them. I'm in the West Suburbs, or come to Great Lakes Dragaway this Saturday for the Chicagoland Buick Club race.....
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87 GN T63E, PTE FM, MSD 50's, Atr DP w/ext gate, ATR 2 1/2 duals, 5 disc Vigilante Jimmys trans HR sway bar 10.87@125.01 1.52 60' on Alkycontrol and TT Speed density chip TTA#259 6262S, 50lb inj, RJC boost controller, THDP,MT DRs. 10.80@124.00. 1.53 60' Alky control TT SD chip. PLX SM-AFR WB, Power Logger,Jimmy's trans. 3200 Vigilante 5 disc LU |
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Quote:
X10 i think couldnt keep count
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1987 GN 2nd owner 54K miles, under construction ![]() 1986 GN T Top, 20K miles, under construction ![]() 1969 Camaro Z28 (X77) low miles original 1987 GN 2nd owner (Sold) Last edited by daves87gn; June 15th, 2009 at 01:36 AM. |
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Here's my car when it had the old Flowmasters on it:
http://www.youtube.com/watch?v=oKwDLRJXkuo Here it is with a straight shot 3 inch single pipe and Ultraflow muffler: http://www.youtube.com/watch?v=w5_a5Bs4fXc You be the judge.... I can say it definitely has more top end power with the 3 inch set up....
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![]() 1987 Regal LC2, hot-wired, Walbro 255 lph fuel pump, blue top injectors, Accufab adjustable fuel pressure regulator, Turbo Tweak chip, GN110T cam, TE-44 turbo, Alkycontrol, 3 inch mandrel bent Dynomax exhaust, Scanmaster, OD lockout detent plate, trunk braces, jounce braces, 145 mph speedo, RJC power plate and RJC boost controller Quote:
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I like no mufflers, sounds and performs great.
There isn't a muffler that flows better than a Hooker Max Flow, it literally flows like a straight pipe which is great for any FI car. LS1TECH
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Mike HOT AIR 87GN T-Top, down 462lbs E85 and NO FMIC Rebuild #2, BLK/BL Paint w/Custom Metal Flares, VPE Stg 3 Heads, 210/215 Roller Cam, TA49, Billet Drum/Input, PI 3400 5disc, T Brake, Inland 3.5" DS, KB Plenum/70mm TB, Razor's Post Turbo Alky, Devils Own Pre Turbo Alky, TT E85 Chip, 80lb Inj, Denso 280 Pump with Racetronix Kit,-8/-6 SS Fuel Lines, MBC, Pwr Plt, Turbo Protector and -3 Feedline, Preluber, F Body Rad, Z06 Maf, Translator, Volt Master, Poston Headers, THSS 3.5" DP/Test Pipe, ATR SS 2.5" Y Pipe w/No Muffs, PST 2" Drop, Poly Bushings, Boxed Upper/Lower Arms, QA1 Rear Shocks, Vacuum Brakes, Aerospace 10.75" Brakes w/SS lines, Alum Drums, Polished Autodrags 15x8/15x10, 275/60 Nitto 555Rs |
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First thing I noticed was the sound. They sound like crap. Specially WOT. According to the seat dyno, the car did not run any different just sounded worse. I was soon back at the speed shop picking up some more flowmasters. They sound the best hands down. The car runs just as strong if not stronger with the flowmasters.Be glad to take anyone for a ride. You too can become a believer. Right John? LOL! |
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87GN 6776bb, stock bottom end, stock heads & intake, 206/206, 60#, PTC 10" 2800 , TT, Alkycontrol 11.20@118 mph 1.71 60' @ 23 psi87 Grand National-current 87 Turbo T Limited-Sold 87 T-Type-Sold |
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Yes they made the mufflers. I went down and pick up my system when they were still open, and they took me on a tour and I saw them making them there.
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87 GN, PTE 52, BGC stretch intercooler, MSD 50's, AC 9" non/lock, ATR 3'' downpipe with ext wastegate, ATR 2 1/2" exh, MM translator, PMAC tranny, 65mm thottle body and upper plem, All bolt on's only! Full weight. just turned 21,000k 7.31@94mph 1/8th. 11.70 best mph 115. 87 turbo regal, TA Block, Forged, Crank, Rods, Pistions, Billet 214/210 roller cam, Ported TA Heads,TA Headers, 70bb hpq turbo, XFI, Razor Alky,double pumper, Bigwood Racing 3 1/2" downpipe with 50mm turbosmart wg, RJC megacooler,9.5 PTC, Extreme Automatics 2004r, etc. Street car Thanks to Nick Micale, Mike Zimmerman, Hartline Performace. Travis Treadway |
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a work in progress set for the 2010 release! |
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My 2 1/2" Pit Bulls droned, but sounded great. I have added the Ultraflow crossflow & got rid of the drone & it is quieter. Pit Bulls & Ultraflow are straight through & almost no performance difference compared to open dump.
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87T, Baer 12", VR4, Hydroboost, KB cold air, HRP & S lowers, Cibie lights, hotwire, Denso, digitails |
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