expert in automobiles . please add a reason or a talk parameter to this template to explain the issue with the article . wikiproject automobiles or its portal may be able to help recruit an expert . june 2015 callaway cars incorporated type private industry automobile tuning and parts manufacturer founded 1977 founder reeves callaway headquarters old lyme connecticut united states key people reeves callaway owner reeves callaway slogan powerfully engineered automobiles website www.callawaycars.com callaway cars inc. is an engine design company that is known for its modification of chevrolet cars the corvette sport cars in particular especially their twin turbo kit that became a dealer option and their record breaking corvette sledgehammer car . contents 1 history 2 projects 2.1 c1 callaway turbo systems 2.2 c2 callaway hh indy car engine 2.3 c3 alfa romeo callaway twin turbo gtv 6 2.4 c4 rpo b2k callaway twin turbo corvette 2.5 c5 aston martin virage v 8 & amr 1 group c engine 2.6 c6 callaway supernatural corvette 2.7 c7 callaway c7 2.8 c8 supernatural camaro 2.9 c9 callaway impala ss 2.10 c10 limited edition corvette ski boat 2.11 c11 limited edition range rover 4.6 hse 2.12 c12 callaway c12 and ivm c12 2.13 c13 holden special vehicles gts coupe 2.14 c14 mazdaspeed proteg 2.15 c15 fia corvette gt3 2.16 c16 callaway c16 2.17 c17 callaway supercharged corvettes 2.18 c18 2010 2015 callaway camaro 2.19 c19 callaway supercharged sporttrucks 2.20 un numbered projects 2.20.1 rocky ridge callaway special edition 2.20.2 ruger 6.1 supercharged 500 2.20.3 mercedes benz 240d 2.20.4 kohler turbocharged generator sets 2.20.5 callaway gtlm prototype 2.20.6 callaway cyclone v16 2.20.7 c20 sc627 stingray & sc757 z06 3 notable models 3.1 2012 rpo b2k callaway 25th anniversary limited edition corvette 3.2 sledgehammer corvette 3.2.1 performance stats 4 references 5 external links history edit in 1973 reeves callaway not in a financial position to be able to start his dream of embarking on a racing career did what many aspiring 1 drivers do callaway went to work as a driving instructor for bob bondurant s racing school . 1 while using the newly launched bmw 320i as a school car he became familiar with its intricacies and deficiencies he later took hold of one of its cars to his garage in old lyme with the intention of tuning for more power . 1 as a result callaway constructed and installed his first prototype turbocharger system and offered car and driver journalist don sherman to drive the car resulting in a one page article giving the modified car great acclaim . 1 realising its commercial potential sherman told callaway that he could make turbocharger kits available to the bmw community but he didn t even have the equipment to manufacture the components including a drill press . 1 as business began to arrive callaway formed callaway cars inc in 1977 . 1 over the years callaway developed turbocharger kits for bmw volkswagen porsche audi and mercedes benz . he also developed the hh indycar v8 engine and later a twin turbo kit for the alfa romeo gtv6 . the company would become famous in 1987 when they developed a twin turbo kit for the corvette . built under regular production option rpo b2k the callaway twin turbo corvette was available through chevrolet dealers as a factory option . callaway sold 510 of them over a period of five years . 2 callaway was also commissioned by aston martin to design new cylinder heads for the aston martin virage 5.3 l v8 engine which led to managing the engine program for its amr1 group c racer . 1 callaway cars headquarters is in old lyme connecticut with west coast facilities in temecula california and european facilities in leingarten germany . its current projects are the corvette z06 based callaway corvette sc757 stingray based callaway corvette sc627 full size gm truck and suv based callaway sporttruck sc480 sc490 and sc560 series and callaway camaro sc630 . projects edit callaway tend to refer each projects with a c followed by a project number . c1 callaway turbo systems edit the callaway turbo systems is a development program and its subsequent sale of its aftermarket turbocharger systems for bmw vw porsche audi and mercedes benz applications . the callaway c1 vw turbo kit was contracted to drake engineering for the design . in exchange for the design drake engineering concurrently sold the kit under their own name for the first two years of production ; thereafter callaway retained exclusive rights . these were the first of the callaway s projects running from its company s foundation in 1977 to 1984 . 1 c2 callaway hh indy car engine edit the callaway hh indy car engine is a project to build a racing engine for indycar specification from semi scratch as an eleven months long program between 1980 and 81 to show callaway s capability to design and implement complex high performance engine program . 3 the hh design engineer was famed bmw and now freelance engine designer hans hermann . the hh indy car engine v8 block was designed to fit two hermann designed drake engineering water cooled volkswagen 16 valve cylinder heads . with the cylinder bore spacing set by the volkswagen design it may have proven insufficient for proper water cooling the racing engine block . after a few dyno sessions the project was shelved and effectively became a stillborn project . c3 alfa romeo callaway twin turbo gtv 6 edit following its success with their turbocharger kits this led a commission by alfa romeo to produce a higher end version of its 2.5 liter gtv 6 coup . between thirty and thirty six examples were built between 1983 and 1986 with the first prototype being sold and titled as a 1984 model the subsequent four prototypes as 1985 models and the remainder i.e. the regular production being sold as 1986 model year cars . 4 in addition to numerous small component upgrades the callaway gtvs included a much revised suspension improved brakes and a twin turbocharger system boosting performance to near exotic levels . the car s performance caught the attention of dave mclellan chief engineer of the corvette and would lead to the callaway corvette association it became famous for . 1 c4 rpo b2k callaway twin turbo corvette edit supernatural 450 grand sport based on chevrolet corvette c4 . the special edition callaway twin turbo corvette was available from 1987 to 1991 as regular production option rpo b2k and could be ordered from select dealers in the us . corvette orders with the b2k option selected were shipped to callaway cars in old lyme connecticut for the twin turbo conversion directly from the bowling green assembly plant . once converted and tested the callaway corvettes were then shipped to their ordering dealers for final delivery to their respective owners . dealer repairs of the callaway twin turbo corvettes were covered by the standard gm 12 mo. 12 000 mile warranty with callaway cars inc. reimbursing dealers for time and materials on repairs to the added components . this was the only time where gm has allowed a factory orderable non gm performance enhancement on the corvette . the ultimate callaway twin turbo corvette is known as the sledgehammer corvette . until 1999 the callaway sledgehammer corvette held the world street legal speed record of 254.76 mph 410.00 km h . it is an emissions compliant street legal vehicle with all the creature comforts like air conditioning radio etc. that you would find in any production street corvette . built using production chassis 1988 051 it achieved its world record title in november 1988 at the ohio transportation research center trc . in addition to callaway s engine performance improvements the sledgehammer corvette used modified body panels to reduce drag and improve stability . this body modification known as the callaway aerobody was designed by automotive designer paul deutschman . the callaway aerobody was later available as an appearance enhancement option for callaway corvettes beginning in the 1989 model year . on the performance side the 1987 production version of the callaway twin turbo b2k option provided 345 hp 257 kw and 465 lb ft 630 n m of torque with a top speed of 178 mph 286 km h at a price of just over 50k . in those days this brought the callaway corvette into the performance category of ferrari and lamborghini which cost in the range of 100 175k . according to the national corvette museum records that year 188 corvettes were built that model year with the callaway twin turbo b2k option existing on 167 cars . as a footnote to 1987 production one 1986 callaway twin turbo corvette was built at the very start of production . this sole 1986 callaway corvette was built using one of the fifty malcolm konner commemorative edition corvette coupes rpo code 4001za built that year and counted under 1986 callaway corvette production . for 1988 callaway increased the stock performance of the twin turbo corvette to yield 382 hp 285 kw and 562 lb ft 762 n m of torque . that year 125 callaway twin turbo corvettes were built with 105 ordered with the rpo b2k option . the 1989 callaway twin turbo option provided the same power output as the 1988 . however after the world record run of the callaway sledgehammer the aerobody became an option for the callaway twin turbo corvette . a total of 51 b2k callaway twin turbo corvettes were ordered that year with a total of 68 cars produced . in 1990 gm finally introduced their zr 1 corvette which obtained similar performance characteristics as the 1989 callaway twin turbo option . although power was up to 390 hp 291 kw and 562 lb ft 762 n m of torque 1990 saw the lowest number of b2k callaway twin turbo corvettes ordered with 59 with only 58 actually built . to counter the zr 1 for the 1991 model year callaway was able to bring up the output of the b2k option up to 403 hp 301 kw and 582 lb ft 789 n m of torque . 1991 would be the last year of the l98 engine which was the base engine of the callaway twin turbo corvette . there were 62 ordered in this last year of twin turbo production . in total 497 b2k callaway twin turbo corvettes were ordered through the normal sales channels . however before the callaway twin turbo option went away callaway and deutschman went to work to provide yet a more powerful and stunning car the callaway speedster . a small amount of the final twin turbo cars and the speedsters 10 series 1 speedsters w l98 twin turbo were designated 500 series callaway twin turbo corvettes . these unique cars came with oz racing wheels and bridgestone potenza tires a 500 series dash plaque 500 series intercooler badge special car bra car cover and floor mats . regarding the production of the callaway sledgehammer reeves callaway used a production callaway twin turbo corvette 1988 051 to be precise . the car was in fact a production car with all options found in other corvettes the same model year . c5 aston martin virage v 8 & amr 1 group c engine edit aston martin retained callaway to help it re engineer its then 30 year old tadek marek 2v v 8 . callaway s brief was for 4v cylinderheads increased power and single configuration worldwide emissions compliance . the virage road car engine was so successful that aston relied on callaway to supply a race version of the road car engine for their 1989 group c prototype the amr 1 . it finished eleventh in its first and only appearance at le mans . c6 callaway supernatural corvette edit in 1992 base corvettes now used the lt1 engine . with major changes between that engine